| <!-- |
| Copyright 2020 The Chromium Authors |
| Use of this source code is governed by a BSD-style license that can be |
| found in the LICENSE file. |
| --> |
| |
| <!-- |
| This file is used to generate a comprehensive list of Tab histograms |
| along with a detailed description for each histogram. |
| |
| For best practices on writing histogram descriptions, see |
| https://chromium.googlesource.com/chromium/src.git/+/HEAD/tools/metrics/histograms/README.md |
| |
| Please follow the instructions in the OWNERS file in this directory to find a |
| reviewer. If no OWNERS file exists, please consider signing up at |
| go/reviewing-metrics (Googlers only), as all subdirectories are expected to |
| have an OWNERS file. As a last resort you can send the CL to |
| chromium-metrics-reviews@google.com. |
| --> |
| |
| <histogram-configuration> |
| |
| <histograms> |
| |
| <variants name="BatteryState"> |
| <variant name="" summary="On battery or plugged-in"/> |
| <variant name=".OnBattery"/> |
| <variant name=".PluggedIn"/> |
| </variants> |
| |
| <variants name="RecentlyClosedType"> |
| <variant name="Bulk" summary="RecentlyClosedBulkEvent"/> |
| <variant name="Group" summary="RecentlyClosedGroup"/> |
| <variant name="Tab" summary="RecentlyClosedTab"/> |
| </variants> |
| |
| <variants name="TabActiveState"> |
| <variant name="Active" summary="active"/> |
| <variant name="Inactive" summary="inactive"/> |
| </variants> |
| |
| <variants name="TabDiscardReason"> |
| <variant name=".External" |
| summary="from outside of TabManager (e.g. by an extension)"/> |
| <variant name=".Proactive" |
| summary="proactively by Performance Manager before the system is in a |
| critical condition, such as when Memory Saver Mode discards |
| the tab"/> |
| <variant name=".Urgent" |
| summary="urgently by TabManager when the system is in a critical |
| condition"/> |
| </variants> |
| |
| <variants name="Tabs_SwitchLatency"> |
| <variant name="_Actual" |
| summary="The time it takes to show a real live frame from the renderer |
| on the screen after the user selects a tab. This doesn not |
| include fake snapshots or other tricks, but the actual time to |
| get real interactable content displayed."/> |
| </variants> |
| |
| <histogram name="Discarding.DailyDiscards{TabDiscardReason}" units="tabs" |
| expires_after="2024-02-22"> |
| <owner>vovoy@chromium.org</owner> |
| <owner>fdoray@chromium.org</owner> |
| <summary> |
| The number of tabs discards since last emit. The emit interval is at least |
| 24 hours, see metrics::DailyEvent for more details. The discards are |
| requested {TabDiscardReason}. |
| </summary> |
| <token key="TabDiscardReason" variants="TabDiscardReason"/> |
| </histogram> |
| |
| <histogram name="Discarding.DailyReloads{TabDiscardReason}" units="tabs" |
| expires_after="2024-02-22"> |
| <owner>vovoy@chromium.org</owner> |
| <owner>fdoray@chromium.org</owner> |
| <summary> |
| The number of tabs reloads since last emit. The emit interval is at least 24 |
| hours, see metrics::DailyEvent for more details. The discards corresponding |
| to the reloads are requested {TabDiscardReason}. |
| </summary> |
| <token key="TabDiscardReason" variants="TabDiscardReason"/> |
| </histogram> |
| |
| <histogram name="Discarding.DiscardCandidatesCount" units="tabs" |
| expires_after="2023-12-18"> |
| <owner>chrisha@chromium.org</owner> |
| <owner>catan-team@chromium.org</owner> |
| <summary> |
| The number of tabs discard candidates. This is recorded each time Chrome |
| needs to urgently discard a tab. |
| </summary> |
| </histogram> |
| |
| <histogram name="Discarding.LargestTabFootprint" units="MiB" |
| expires_after="2021-02-28"> |
| <owner>chrisha@chromium.org</owner> |
| <owner>catan-team@chromium.org</owner> |
| <summary> |
| The largest tab's resident set among all the urgent discarding candidates. |
| </summary> |
| </histogram> |
| |
| <histogram name="Discarding.OldestTabFootprint" units="MiB" |
| expires_after="2021-02-28"> |
| <owner>chrisha@chromium.org</owner> |
| <owner>catan-team@chromium.org</owner> |
| <summary>The resident set of the oldest urgent discarding candidate.</summary> |
| </histogram> |
| |
| <histogram name="Discarding.OnCriticalPressure.TotalRSS_Mb2" units="MB" |
| expires_after="2021-10-30"> |
| <owner>chrisha@chromium.org</owner> |
| <owner>catan-team@chromium.org</owner> |
| <summary> |
| An estimate of the total resident set of Chrome when receiving a critical |
| memory pressure event, in megabytes. Note that the estimate is based on the |
| most recent data collected by Performance Manager, which are refreshed at a |
| low frequency (up to 2 minutes). |
| </summary> |
| </histogram> |
| |
| <histogram name="Discarding.OnCriticalPressure.TotalRSS_PercentOfRAM2" |
| units="%" expires_after="2021-10-30"> |
| <owner>chrisha@chromium.org</owner> |
| <owner>catan-team@chromium.org</owner> |
| <summary> |
| An estimate of the total resident set of Chrome when receiving a critical |
| memory pressure event, in percentage of the total amount of RAM. Note that |
| the estimate is based on the most recent data collected by Performance |
| Manager, which are refreshed at a low frequency (up to 2 minutes). |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.AgeAtDeletion" units="ms" expires_after="2023-12-13"> |
| <owner>ewannpv@chromium.org</owner> |
| <owner>gambard@chromium.org</owner> |
| <owner>bling-team@google.com</owner> |
| <summary> |
| The age of a Tab when closed (Time between creation time on the current |
| device and closure time). |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.AndroidCrashUpload{AndroidCrashUploadTypes}" |
| enum="BooleanSuccess" expires_after="M85"> |
| <owner>wnwen@chromium.org</owner> |
| <summary> |
| [Android] Count of upload success/failures by crash type. |
| {AndroidCrashUploadTypes} |
| </summary> |
| <token key="AndroidCrashUploadTypes"> |
| <variant name="_Browser" summary="Measures browser crash uploads."/> |
| <variant name="_GPU" summary="Measures GPU crash uploads."/> |
| <variant name="_Other" summary="Measures other crash uploads."/> |
| <variant name="_Renderer" summary="Measures renderer crash uploads."/> |
| </token> |
| </histogram> |
| |
| <histogram name="Tab.BackgroundLoadStatus" enum="TabBackgroundLoadStatus" |
| expires_after="M77"> |
| <owner>ppi@chromium.org</owner> |
| <summary> |
| Mobile-specific metric: when a tab that was opened in background (via |
| "Open link in new tab") is switched to, we record whether the |
| eagerly loaded tab was still memory resident, or we lost the loaded page due |
| to memory pressure. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.CloseAllTabsDialog.ClosedAllTabs" enum="Boolean" |
| expires_after="2022-09-11"> |
| <obsolete> |
| Removed 4/2022. Replaced with a metric split by incognito and non-incognito |
| usage of the modal dialog as experiments showed possible differences between |
| the groups. The sum of the new .Incognito and .NonIncognito values should be |
| equivalent to what this value reported. |
| </obsolete> |
| <owner>ckitagawa@chromium.org</owner> |
| <owner>fredmello@chromium.org</owner> |
| <summary> |
| Records whether the "Close all tabs" action was taken when the |
| close all tabs confirmation dialog was shown through App Menu > Close all |
| tabs. This is only recorded for Android. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.CloseAllTabsDialog.ClosedAllTabs.{CloseType}" |
| enum="Boolean" expires_after="2023-09-11"> |
| <owner>ckitagawa@chromium.org</owner> |
| <owner>fredmello@chromium.org</owner> |
| <summary> |
| Records whether the "Close all tabs" action was taken when the |
| close all tabs confirmation dialog was shown through App Menu > Close all |
| tabs. This is only recorded for Android for {CloseType} close all tabs menu |
| actions. |
| </summary> |
| <token key="CloseType"> |
| <variant name="Incognito"/> |
| <variant name="NonIncognito"/> |
| </token> |
| </histogram> |
| |
| <histogram name="Tab.Count.Guest" units="units" expires_after="2023-09-03"> |
| <owner>rhalavati@chromium.org</owner> |
| <owner>chrome-incognito@google.com</owner> |
| <summary> |
| Number of open tabs in each guest window. Recorded once a new tab in a guest |
| window is opened and adds one to the bucket of number of tabs in that |
| particular window (it does not count the total number of tabs in all open |
| guest windows). Please note that this metric double counts the lower |
| numbers, meaning that if user opens three tabs (without closing any in |
| between), then buckets 1, 2, and 3 will all be incremented in turn. The |
| metric also overcounts the tabs that are moved from one window to another as |
| they are recorded both when they are created in the first window and when |
| they are added to the second window. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.Count.Incognito" units="units" expires_after="2023-08-27"> |
| <owner>rhalavati@chromium.org</owner> |
| <owner>chrome-incognito@google.com</owner> |
| <summary> |
| Number of open tabs in each incognito window. Recorded once a new tab is |
| opened in an incognito window and adds one to the bucket of number of tabs |
| in that particular window (it does not count the total number of tabs in all |
| open incognito windows). Please note that this metric double counts the |
| lower numbers, meaning that if user opens three tabs (without closing any in |
| between), then buckets 1, 2, and 3 will all be incremented in turn. The |
| metric also overcounts the tabs that are moved from one window to another as |
| they are recorded both when they are created in the first window and when |
| they are added to the second window. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.ExternalApplicationOpened" enum="ExternalLauncherOption" |
| expires_after="2022-08-21"> |
| <owner>mrefaat@chromium.org</owner> |
| <owner>bling-team@google.com</owner> |
| <summary> |
| [iOS] Used on External App launcher Prompt to determine if the user clicked |
| open or cancel. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.NewTab" enum="NewTabType" expires_after="2023-10-22"> |
| <owner>tbergquist@chromium.org</owner> |
| <owner>bsep@chromium.org</owner> |
| <summary> |
| Recorded when a new tab is opened. Tracks the method in which the tab was |
| opened. Does not apply to opening existing links or searches in a new tab, |
| only to brand new empty tabs. Note: Currently the "Regular menu |
| option" includes some programmatic actions in addition to user actions. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.NewTabOnload{TabNewTabOnload}" units="ms" |
| expires_after="2021-03-07"> |
| <owner>carlosk@chromium.org</owner> |
| <owner>harringtond@chromium.org</owner> |
| <summary> |
| The time for the new tab page to load. Only recorded on Android. Recorded |
| only once per tab, i.e. excluding back/forward navigations. |
| {TabNewTabOnload} |
| </summary> |
| <token key="TabNewTabOnload"> |
| <variant name=""/> |
| </token> |
| </histogram> |
| |
| <histogram name="Tab.PageLoadInPortrait" enum="DeviceOrientation" |
| expires_after="M85"> |
| <owner>marq@chromium.org</owner> |
| <summary>[iOS] The orientation of the device. Recorded on page load.</summary> |
| </histogram> |
| |
| <histogram name="Tab.PageLoadsSinceLastSwitchToEvictedTab" units="units" |
| expires_after="M77"> |
| <owner>dtrainor@chromium.org</owner> |
| <summary> |
| [Android] The number of page loads since the last switch to an evicted tab |
| on Android. This was sampled each time an evicted tab was reloaded. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.PerceivedRestoreTime" units="ms" |
| expires_after="2023-09-03"> |
| <owner>ckitagawa@chromium.org</owner> |
| <owner>dtrainor@chromium.org</owner> |
| <owner>yfriedman@chromium.org</owner> |
| <summary> |
| [Android] User-perceived load time for a successful tab restore, measured |
| from the first time the user sees the tab being restored until the load |
| completes. |
| |
| Warning this historgram was expired between M89 and 2022-08-24. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.Preview.TimeToFirstUsableFrameAfterStartCapture" |
| units="ms" expires_after="2023-08-06"> |
| <owner>dfried@chromium.org</owner> |
| <owner>collinbaker@chromium.org</owner> |
| <summary> |
| When generating a preview for a background tab, this measures the time |
| between requesting a video capture and receiving the first usable frame. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.Preview.TimeToNotifyObserversAfterCaptureReceived" |
| units="microseconds" expires_after="2022-11-27"> |
| <obsolete> |
| Removed 12/2022. Not actively used because reported values are 0 most of the |
| time. It would be more useful to report number of discards per day. |
| </obsolete> |
| <owner>dfried@chromium.org</owner> |
| <owner>collinbaker@chromium.org</owner> |
| <summary> |
| When generating a preview, a tab's contents are captured as an uncompressed |
| image, compressed in the background, then sent to subscribers on the main |
| thread. This roughly measures the time between the capture completing and |
| the compressed image being available on the main thread. |
| |
| This histogram only records metrics on machines with high-resolution clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.Preview.TimeToStoreAfterFrameReceived" |
| units="microseconds" expires_after="2022-11-27"> |
| <obsolete> |
| Removed 12/2022. Not actively used because reported values are 0 most of the |
| time. It would be more useful to report number of discards per day. |
| </obsolete> |
| <owner>dfried@chromium.org</owner> |
| <owner>collinbaker@chromium.org</owner> |
| <summary> |
| When generating a preview for a background tab, this measures the time |
| between receiving a frame and storing it as the current thumbnail. |
| |
| This histogram only records metrics on machines with high-resolution clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.Preview.TimeToStoreAfterTabSwitch" units="ms" |
| expires_after="2023-08-20"> |
| <owner>dfried@chromium.org</owner> |
| <owner>collinbaker@chromium.org</owner> |
| <summary> |
| On tab switch, the visible content area is captured and stored as a |
| thumbnail. This measures the time between requesting the capture and storing |
| it as the current thumbnail. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.Preview.VideoCaptureDuration" units="ms" |
| expires_after="2022-11-27"> |
| <obsolete> |
| Removed 12/2022. Not actively used because reported values are 0 most of the |
| time. It would be more useful to report number of discards per day. |
| </obsolete> |
| <owner>dfried@chromium.org</owner> |
| <owner>collinbaker@chromium.org</owner> |
| <summary> |
| Measures the total time spent in video capture mode when generating a |
| preview for a background tab. This is emitted at the end of each capture |
| session. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.PullDownGesture" enum="PullDownGestureAction" |
| expires_after="2024-01-15"> |
| <owner>gambard@chromium.org</owner> |
| <owner>chromeleon@google.com</owner> |
| <summary> |
| Record the action executed when the user performs a pull down gesture. This |
| feature is currently iOS only. |
| |
| A pull down gesture is an action completed when the user scrolls past the |
| edge of the web page and continues scrolling in the same direction revealing |
| a specific UI on the header with multiple actions icons. The user can then |
| choose an action by scrolling left or right and lift the finger or cancel by |
| scrolling back up. This is currently an iOS specific feature. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.RendererTermination.AliveRenderersCount" units="renderers" |
| expires_after="2023-09-17"> |
| <owner>ajuma@chromium.org</owner> |
| <owner>bling-fundamentals@google.com</owner> |
| <summary> |
| [iOS] A count of the number of alive renderers in the current window when a |
| renderer termination occurs. Expired for M78-94. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.RendererTermination.RecentlyAliveRenderersCount" |
| units="renderers" expires_after="M106"> |
| <owner>pkl@chromium.org</owner> |
| <summary> |
| [iOS] The number of renderers which are either currently alive or recently |
| terminated in the current window at the time of a renderer termination. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.RendererTermination.TotalTabCount" units="tabs" |
| expires_after="2023-09-17"> |
| <owner>ajuma@chromium.org</owner> |
| <owner>thegreenfrog@chromium.org</owner> |
| <summary> |
| [iOS] The number of tabs of the current window at the time of a renderer |
| termination. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.RestoreClosedTab" enum="Boolean" |
| expires_after="2023-11-30"> |
| <owner>sreejakshetty@chromium.org</owner> |
| <owner>chrome-brapp-loading@google.com</owner> |
| <summary> |
| [Desktop] This metric is recorded whenever a tab is restored by the user. |
| Set to true if the tab is restored from ClosedTabCache and false indicates |
| the tab is restored normally. This accounts for all types of tab restores |
| i.e., in a closed window, closed group also on startup tab restores. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.Screenshot.Action" enum="TabScreenshotAction" |
| expires_after="2023-10-08"> |
| <owner>skare@chromium.org</owner> |
| <summary> |
| Records actions taken after one or more screenshots of a page were taken. |
| This will not be recorded if Chromium is killed before leaving the page. If |
| several types of action (IPH and Sharing) occur, only the last is recorded. |
| We think that both IPH and Sharing happening at the same time is rare, so we |
| do not expect to lose much data this way. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.Screenshot.ScreenshotsPerPage" units="screenshots" |
| expires_after="2022-12-18"> |
| <owner>skare@chromium.org</owner> |
| <summary> |
| Records the number of screenshots taken of a specific page. It is recorded |
| when the user navigates away from this page or the tab is destroyed. This |
| will not be recorded if Chromium is killed before leaving the page. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.StateAtRendererTermination" enum="TabForegroundState" |
| expires_after="2023-09-17"> |
| <owner>gambard@chromium.org</owner> |
| <owner>olivierrobin@chromium.org</owner> |
| <summary> |
| The state (foreground/background) of a tab when its renderer is terminated. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.StatusWhenSwitchedBackToForeground" enum="TabStatus" |
| expires_after="2023-09-03"> |
| <owner>ckitagawa@chromium.org</owner> |
| <owner>marq@chromium.org</owner> |
| <summary> |
| [Android and iOS] The status of a tab collected each time the user switches |
| to it on mobile. That does not include tabs being created at the time the |
| user switches to them, such as NTP or tabs opened to handle intents. |
| |
| Warning this historgram was expired between M86 and 2022-08-24. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.SwitchedToForegroundAge" units="ms" expires_after="M85"> |
| <owner>dtrainor@chromium.org</owner> |
| <summary> |
| [Android] Age (in ms) when the tab was switched to foreground. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tab.TotalTabCount.BeforeLeavingApp" units="tabs" |
| expires_after="M85"> |
| <owner>tedchoc@chromium.org</owner> |
| <owner>clank-team@google.com</owner> |
| <summary> |
| [Android] The total count of tabs which were kept while Chrome process is in |
| the foreground. This is recorded only for Android right before Chrome |
| process goes into the background. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabGroups.CollapsedGroupCountPerLoad" units="groups" |
| expires_after="2023-10-22"> |
| <owner>dpenning@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| The number of tabs groups that are collapsed in all browsers (counting |
| app-mode windows) when a load completes. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabGroups.CollapsedTabCount" units="tabs" |
| expires_after="2021-09-12"> |
| <owner>dpenning@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| The number of tabs in a collapsed tab group in all browsers, reported every |
| 5 minutes. Desktop only. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabGroups.NonZeroUserGroupCountPerLoad" units="groups" |
| expires_after="2021-09-12"> |
| <owner>dpenning@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| The number of (non-zero) tabs groups open in all browsers (counting app-mode |
| windows) when a load completes. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabGroups.SessionsPerGroup" units="sessions" |
| expires_after="2023-10-22"> |
| <owner>yusufo@chromium.org</owner> |
| <owner>wychen@chromium.org</owner> |
| <summary> |
| This histogram records the number of sessions of a selected tab group |
| whenever Chrome comes to the foreground, or switch tab in the tab switcher. |
| This number is accumulated until that group id is outdated, meaning all the |
| tabs with that group id has been closed. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabGroups.TimeSpentCollapsed2" units="seconds" |
| expires_after="2021-09-12"> |
| <owner>dpenning@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| The time a tab group spends in the collapsed state before the group is |
| either expanded or closed. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabGroups.TimeSpentExpanded2" units="seconds" |
| expires_after="2021-09-12"> |
| <owner>dpenning@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| The time a tab group spends in the expanded state before the group is either |
| collapsed or closed. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabGroups.UserCustomizedGroupCountPerLoad" units="groups" |
| expires_after="2023-09-03"> |
| <owner>dpenning@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| The number of tabs groups with a user-set name or color open in all browsers |
| (counting app-mode windows) when a load completes. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabGroups.UserGroupCount" units="groups" |
| expires_after="2023-09-10"> |
| <owner>yusufo@chromium.org</owner> |
| <owner>wychen@chromium.org</owner> |
| <summary> |
| This histogram records the number of tab groups whenever Chrome comes to the |
| foreground. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabGroups.UserGroupCountPerLoad" units="groups" |
| expires_after="2023-10-22"> |
| <owner>dpenning@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| The number of tabs groups open in all browsers (counting app-mode windows) |
| when a load completes. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabGroups.UserNamedGroupCount" units="groups" |
| expires_after="2023-09-10"> |
| <owner>yusufo@chromium.org</owner> |
| <owner>wychen@chromium.org</owner> |
| <summary> |
| This histogram records the number of tab groups that have customized group |
| name whenever Chrome comes to the foreground. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabGroups.UserPinnedTabCountPerLoad" units="tabs" |
| expires_after="2023-09-05"> |
| <owner>dpenning@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| The number of pinned tabs in the tabstrip in all browser windows, when a |
| page load completes. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabHoverCards.LastTabHoverCardPreviewTime{TabCountMetrics}" |
| units="ms" expires_after="2023-01-01"> |
| <obsolete> |
| Removed 12/2022. Not actively used because reported values are 0 most of the |
| time. It would be more useful to report number of discards per day. |
| </obsolete> |
| <owner>dfried@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| This histogram records the time the user sees a full hover card with preview |
| image on tab they then go on to select. The time is counted from the time |
| the hover card is fully opaque and has landed on the target tab and a valid |
| preview image for the tab is visible, and may be zero if the user clicks |
| before the preview appears. This metric is not recorded if previews are |
| disabled. {TabCountMetrics} |
| </summary> |
| <token key="TabCountMetrics"> |
| <variant name=""/> |
| <variant name=".ByTabCount.0To2Tabs" |
| summary="Recorded with between 0 and 3 tabs open in the browser."/> |
| <variant name=".ByTabCount.3To4Tabs" |
| summary="Recorded with between 3 and 4 tabs open in the browser."/> |
| <variant name=".ByTabCount.5To7Tabs" |
| summary="Recorded with between 5 and 7 tabs open in the browser."/> |
| <variant name=".ByTabCount.8To19Tabs" |
| summary="Recorded with between 8 and 19 tabs open in the browser."/> |
| <variant name=".ByTabCount.20To39Tabs" |
| summary="Recorded with between 20 and 39 tabs open in the browser."/> |
| <variant name=".ByTabCount.40OrMoreTabs" |
| summary="Recorded with 40 or more tabs open in the browser."/> |
| </token> |
| </histogram> |
| |
| <histogram name="TabHoverCards.LastTabHoverCardViewedTime{TabCountMetrics}" |
| units="ms" expires_after="2023-01-01"> |
| <obsolete> |
| Removed 12/2022. Not actively used because reported values are 0 most of the |
| time. It would be more useful to report number of discards per day. |
| </obsolete> |
| <owner>dfried@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| This histogram records the time the user sees a full hover card on tab they |
| then go on to select. The time is counted from the time the hover card is |
| fully opaque and has landed on the target tab, and may be zero if the user |
| clicks before the card is visible. {TabCountMetrics} |
| </summary> |
| <token key="TabCountMetrics"> |
| <variant name=""/> |
| <variant name=".ByTabCount.0To2Tabs" |
| summary="Recorded with between 0 and 3 tabs open in the browser."/> |
| <variant name=".ByTabCount.3To4Tabs" |
| summary="Recorded with between 3 and 4 tabs open in the browser."/> |
| <variant name=".ByTabCount.5To7Tabs" |
| summary="Recorded with between 5 and 7 tabs open in the browser."/> |
| <variant name=".ByTabCount.8To19Tabs" |
| summary="Recorded with between 8 and 19 tabs open in the browser."/> |
| <variant name=".ByTabCount.20To39Tabs" |
| summary="Recorded with between 20 and 39 tabs open in the browser."/> |
| <variant name=".ByTabCount.40OrMoreTabs" |
| summary="Recorded with 40 or more tabs open in the browser."/> |
| </token> |
| </histogram> |
| |
| <histogram name="TabHoverCards.TabHoverCardPreviewTime{TabCountMetrics}" |
| units="ms" expires_after="2023-01-01"> |
| <obsolete> |
| Removed 12/2022. Not actively used because reported values are 0 most of the |
| time. It would be more useful to report number of discards per day. |
| </obsolete> |
| <owner>dfried@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| This histogram records the time the user sees a full hover card with preview |
| image on any tab. The time is counted from the time the hover card is fully |
| opaque and has landed on the target tab and a valid preview image for the |
| tab is visible. This metric is not recorded if previews are disabled, or if |
| an image is never displayed for the tab. {TabCountMetrics} |
| </summary> |
| <token key="TabCountMetrics"> |
| <variant name=""/> |
| <variant name=".ByTabCount.0To2Tabs" |
| summary="Recorded with between 0 and 3 tabs open in the browser."/> |
| <variant name=".ByTabCount.3To4Tabs" |
| summary="Recorded with between 3 and 4 tabs open in the browser."/> |
| <variant name=".ByTabCount.5To7Tabs" |
| summary="Recorded with between 5 and 7 tabs open in the browser."/> |
| <variant name=".ByTabCount.8To19Tabs" |
| summary="Recorded with between 8 and 19 tabs open in the browser."/> |
| <variant name=".ByTabCount.20To39Tabs" |
| summary="Recorded with between 20 and 39 tabs open in the browser."/> |
| <variant name=".ByTabCount.40OrMoreTabs" |
| summary="Recorded with 40 or more tabs open in the browser."/> |
| </token> |
| </histogram> |
| |
| <histogram |
| name="TabHoverCards.TabHoverCardsSeenBeforeTabSelection{TabCountMetrics}" |
| units="hover cards" expires_after="2023-01-01"> |
| <obsolete> |
| Removed 12/2022. Not actively used because reported values are 0 most of the |
| time. It would be more useful to report number of discards per day. |
| </obsolete> |
| <owner>dfried@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| This histogram records the number of tab hover cards seen between the last |
| active tab change and a tab change by mouse click. {TabCountMetrics} |
| </summary> |
| <token key="TabCountMetrics"> |
| <variant name=""/> |
| <variant name=".ByTabCount.0To2Tabs" |
| summary="Recorded with between 0 and 3 tabs open in the browser."/> |
| <variant name=".ByTabCount.3To4Tabs" |
| summary="Recorded with between 3 and 4 tabs open in the browser."/> |
| <variant name=".ByTabCount.5To7Tabs" |
| summary="Recorded with between 5 and 7 tabs open in the browser."/> |
| <variant name=".ByTabCount.8To19Tabs" |
| summary="Recorded with between 8 and 19 tabs open in the browser."/> |
| <variant name=".ByTabCount.20To39Tabs" |
| summary="Recorded with between 20 and 39 tabs open in the browser."/> |
| <variant name=".ByTabCount.40OrMoreTabs" |
| summary="Recorded with 40 or more tabs open in the browser."/> |
| </token> |
| </histogram> |
| |
| <histogram name="TabHoverCards.TabHoverCardViewedTime{TabCountMetrics}" |
| units="ms" expires_after="2023-01-01"> |
| <obsolete> |
| Removed 12/2022. Not actively used because reported values are 0 most of the |
| time. It would be more useful to report number of discards per day. |
| </obsolete> |
| <owner>dfried@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| This histogram records the time the user sees a full hover card on any tab. |
| The time is counted from the time the hover card is fully opaque and has |
| landed on the tab. This metric is not recorded if the card never actually |
| lands on the tab. {TabCountMetrics} |
| </summary> |
| <token key="TabCountMetrics"> |
| <variant name=""/> |
| <variant name=".ByTabCount.0To2Tabs" |
| summary="Recorded with between 0 and 3 tabs open in the browser."/> |
| <variant name=".ByTabCount.3To4Tabs" |
| summary="Recorded with between 3 and 4 tabs open in the browser."/> |
| <variant name=".ByTabCount.5To7Tabs" |
| summary="Recorded with between 5 and 7 tabs open in the browser."/> |
| <variant name=".ByTabCount.8To19Tabs" |
| summary="Recorded with between 8 and 19 tabs open in the browser."/> |
| <variant name=".ByTabCount.20To39Tabs" |
| summary="Recorded with between 20 and 39 tabs open in the browser."/> |
| <variant name=".ByTabCount.40OrMoreTabs" |
| summary="Recorded with 40 or more tabs open in the browser."/> |
| </token> |
| </histogram> |
| |
| <histogram |
| name="TabHoverCards.TabPreviewsSeenBeforeTabSelection{TabCountMetrics}" |
| units="previews" expires_after="2023-01-01"> |
| <obsolete> |
| Removed 12/2022. Not actively used because reported values are 0 most of the |
| time. It would be more useful to report number of discards per day. |
| </obsolete> |
| <owner>dfried@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| This histogram records the number of tab hover card previews seen between |
| the last active tab change and a tab change by mouse click. |
| {TabCountMetrics} |
| </summary> |
| <token key="TabCountMetrics"> |
| <variant name=""/> |
| <variant name=".ByTabCount.0To2Tabs" |
| summary="Recorded with between 0 and 3 tabs open in the browser."/> |
| <variant name=".ByTabCount.3To4Tabs" |
| summary="Recorded with between 3 and 4 tabs open in the browser."/> |
| <variant name=".ByTabCount.5To7Tabs" |
| summary="Recorded with between 5 and 7 tabs open in the browser."/> |
| <variant name=".ByTabCount.8To19Tabs" |
| summary="Recorded with between 8 and 19 tabs open in the browser."/> |
| <variant name=".ByTabCount.20To39Tabs" |
| summary="Recorded with between 20 and 39 tabs open in the browser."/> |
| <variant name=".ByTabCount.40OrMoreTabs" |
| summary="Recorded with 40 or more tabs open in the browser."/> |
| </token> |
| </histogram> |
| |
| <histogram name="TabHoverCards.TimeSinceLastVisible" units="ms" |
| expires_after="2023-01-01"> |
| <obsolete> |
| Removed 12/2022. Not actively used because reported values are 0 most of the |
| time. It would be more useful to report number of discards per day. |
| </obsolete> |
| <owner>corising@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| This histogram records the time between when a hover card was last hidden to |
| when it is shown again. Since users can easily hover out of the tab strip we |
| want to reshow the tab hover card with no delay if we think they |
| unintentionally exited the tab strip. If the user reenters the tab strip |
| within X ms we want to reshow the hover card immediately. This histogram |
| will help to better refine that number. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabManager.BackgroundTabOpening.TabCount" units="tabs" |
| expires_after="M79"> |
| <owner>chrisha@chromium.org</owner> |
| <summary> |
| The max number of background tabs pending or loading when opening background |
| tabs. This is recorded at the end of the background tab opening session (the |
| duration of time from when the browser starts to open background tabs until |
| the time the browser has finished loading those tabs or otherwise decided to |
| stop loading them). The metric is not recorded when the session overlaps |
| with session restore. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabManager.BackgroundTabOpening.TabLoadAutoStartedCount" |
| units="tabs" expires_after="M79"> |
| <owner>chrisha@chromium.org</owner> |
| <summary> |
| The number of background tabs whose loading was triggered by TabManager |
| automatically when opening background tabs. This is recorded at the end of |
| the background tab opening session (the duration of time from when the |
| browser starts to open background tabs until the time the browser has |
| finished loading those tabs or otherwise decided to stop loading them). The |
| metric is not recorded when the session overlaps with session restore. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabManager.BackgroundTabOpening.TabLoadTimeout" |
| enum="BooleanTimedOut" expires_after="M79"> |
| <owner>chrisha@chromium.org</owner> |
| <summary> |
| Whether the tab load is timed out during background tab opening session (the |
| duration of time from when the browser starts to open background tabs until |
| the time the browser has finished loading those tabs or otherwise decided to |
| stop loading them). The metric is not recorded when the session overlaps |
| with session restore. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabManager.BackgroundTabOpening.TabLoadUserInitiatedCount" |
| units="tabs" expires_after="M79"> |
| <owner>chrisha@chromium.org</owner> |
| <summary> |
| The number of background tabs whose loading was triggered by user action |
| when opening background tabs. For example, when the user selects a |
| background tab and brings it to foreground, that tab will start to load |
| immediately if not already loading. This is recorded at the end of the |
| background tab opening session (the duration of time from when the browser |
| starts to open background tabs until the time the browser has finished |
| loading those tabs or otherwise decided to stop loading them). The metric is |
| not recorded when the session overlaps with session restore. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabManager.BackgroundTabOpening.TabPausedCount" units="tabs" |
| expires_after="M79"> |
| <owner>chrisha@chromium.org</owner> |
| <summary> |
| The max number of background tabs paused to load due to memory pressure when |
| opening background tabs. This is recorded at the end of the background tab |
| opening session during a background tab opening session (the duration of |
| time from when the browser starts to open background tabs until the time the |
| browser has finished loading those tabs or otherwise decided to stop loading |
| them). The metric is not recorded when the session overlaps with session |
| restore. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabManager.Discarding.DiscardCount" units="Discards" |
| expires_after="2023-09-03"> |
| <owner>chrisha@chromium.org</owner> |
| <owner>catan-team@chromium.org</owner> |
| <summary> |
| Cumulative number of tabs discarded due to low memory conditions, recorded |
| once per tab discard event. For example, a user who had 3 tabs discarded |
| records a count in the 1 bin, 2 bin and 3 bin. Thus each bin N is the number |
| of sessions where users experienced N or more tab discard events. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabManager.Discarding.DiscardedTabCouldFastShutdown" |
| enum="BooleanTabDiscardFastShutdown" expires_after="M77"> |
| <owner>oysteine@chromium.org</owner> |
| <summary> |
| Recorded for each discarding, indicates whether the discarded tab succeeded |
| in doing a render process fast shutdown or not. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabManager.Discarding.DiscardedTabCouldUnsafeFastShutdown" |
| enum="BooleanTabDiscardFastShutdown" expires_after="M77"> |
| <owner>oysteine@chromium.org</owner> |
| <summary> |
| Recorded for each discarding, allowing us to know whether the discarded tab |
| succeeded an unsafe process shutdown (not invoking unload handlers). |
| </summary> |
| </histogram> |
| |
| <histogram name="TabManager.Discarding.DiscardedTabHasBeforeUnloadHandler" |
| enum="Boolean" expires_after="M77"> |
| <owner>georgesak@chromium.org</owner> |
| <summary> |
| Recorded for each discarding, allowing us to know whether the discarded tab |
| had a before unload handler or not. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabManager.Discarding.DiscardToReloadTime" units="ms" |
| expires_after="2023-10-08"> |
| <owner>chrisha@chromium.org</owner> |
| <owner>catan-team@chromium.org</owner> |
| <summary> |
| Elapsed time between a tab getting discarded to eventually being reloaded by |
| the user. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabManager.Discarding.InactiveToReloadTime" units="ms" |
| expires_after="2023-09-10"> |
| <owner>chrisha@chromium.org</owner> |
| <owner>catan-team@chromium.org</owner> |
| <summary> |
| Elapsed time between the time a tab switched from being active to inactive |
| (that eventually gets discarded) until it gets reloaded. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabManager.Discarding.ReloadCount" units="Reloads" |
| expires_after="2023-09-03"> |
| <owner>chrisha@chromium.org</owner> |
| <owner>catan-team@chromium.org</owner> |
| <summary> |
| Cumulative number of discarded tabs that have been reloaded by the user, |
| recorded once per tab discard event. For example, a user who had 3 tabs |
| reloaded records a count in the 1 bin, 2 bin and 3 bin. Thus each bin N is |
| the number of sessions where users experienced N or more tab reload events. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabManager.Discarding.ReloadToCloseTime" units="ms" |
| expires_after="2023-09-17"> |
| <owner>chrisha@chromium.org</owner> |
| <owner>catan-team@chromium.org</owner> |
| <summary> |
| Elapsed time between the last time a discarded tab was reloaded and the time |
| it gets closed. |
| </summary> |
| </histogram> |
| |
| <histogram |
| name="TabManager.Experimental.SessionRestore.TabSwitchLoadTime.UntilTabIsLoaded" |
| units="ms" expires_after="M79"> |
| <owner>chrisha@chromium.org</owner> |
| <summary> |
| The tab load time of a tab that is switched to during a session restore. Tab |
| load time is defined as the time between when the user switches to a |
| backround tab, and the time when that tab finishes loading in the |
| foreground. If the user switches away before the tab finishes loading, a |
| metric will not be recorded unless the user switches back, in which case the |
| tab load time is measured from that point in time. The metric is only |
| recorded when a tab is switched to from another tab within the same |
| tabstrip. As a result, the initial forground tab is not included in this |
| metric since it was not switched to from another tab. The metric is only |
| recorded when session restore is actively loading tabs, which ends when |
| either all tabs have been loaded and their pages rendered, or tab loading |
| needs to be deferred in cases where the system is under memory pressure. The |
| metric is not recorded when the session overlaps with background tab opening |
| session. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabManager.Heuristics.FromBackgroundedToFirstFaviconUpdated" |
| units="ms" expires_after="M85"> |
| <owner>chrisha@chromium.org</owner> |
| <owner>lpy@chromium.org</owner> |
| <summary> |
| Measures the time duration from when the tab is backgrounded to when its |
| favicon is updated. The first-time set of favicon will be ignored; this |
| metric will only be recorded after 5 minutes from main frame navigation |
| committed and when the tab is in the background. |
| </summary> |
| </histogram> |
| |
| <histogram |
| name="TabManager.Heuristics.FromBackgroundedToFirstNonPersistentNotificationCreated" |
| units="ms" expires_after="M78"> |
| <owner>chrisha@chromium.org</owner> |
| <owner>lpy@chromium.org</owner> |
| <summary> |
| Measures the time duration from when the tab is backgrounded to when a |
| non-persistent notification is created. Only recorded when the tab is in the |
| background. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabManager.Heuristics.FromBackgroundedToFirstTitleUpdated" |
| units="ms" expires_after="M77"> |
| <owner>chrisha@chromium.org</owner> |
| <owner>lpy@chromium.org</owner> |
| <summary> |
| Measures the time duration from when the tab is backgrounded to when its |
| title is updated. The first-time set of title will be ignored; this metric |
| will only be recorded after 5 minutes from main frame navigation committed |
| and when the tab is in the background. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabManager.SessionOverlap.BackgroundTabOpening" |
| enum="BooleanOverlap" expires_after="M79"> |
| <owner>chrisha@chromium.org</owner> |
| <summary> |
| Whether background tab opening session is overlapped with other types of |
| session, e.g., session restore. Background tab opening session is the |
| duration of time from when the browser starts to open background tabs until |
| the time the browser has finished loading those tabs or otherwise decided to |
| stop loading them. This metric helps to understand how often background tab |
| opening has overlap with other sessions. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabManager.TabRanker.Result" enum="TabManagerTabRankerResult" |
| expires_after="M85"> |
| <owner>michaelpg@chromium.org</owner> |
| <owner>charleszhao@chromium.org</owner> |
| <summary> |
| Logged when calculating a tab reactivation score for a background tab. Any |
| value other than "none" may indicate a bug in the inference code, |
| a problem with the preprocessor configuration shipped with the model, or a |
| bug in the code that populates the RankerExample for a tab. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabRestore.{RestoreType}.TimeBetweenClosedAndRestored" |
| units="ms" expires_after="2023-07-10"> |
| <owner>sreejakshetty@chromium.org</owner> |
| <owner>chrome-brapp-loading@google.com</owner> |
| <summary> |
| Recorded when the user restores a {RestoreType}. The value is the time |
| duration between the previous closing of the {RestoreType} and the |
| {RestoreType} being restored. |
| </summary> |
| <token key="RestoreType"> |
| <variant name="Group" summary="tab group"/> |
| <variant name="Tab" summary="tab"/> |
| <variant name="Window" summary="window"/> |
| </token> |
| </histogram> |
| |
| <histogram name="Tabs.ActiveCountAtStartup" units="tabs" |
| expires_after="2023-10-01"> |
| <owner>alionadangla@chromium.org</owner> |
| <owner>lpromero@chromium.org</owner> |
| <owner>chromeleon@google.com</owner> |
| <summary> |
| [iOS] Records the number of tabs that are considered active as per the |
| current tab inactivity threshold. This is recorded at cold launch. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.CountAtResume" units="tabs" expires_after="2024-01-15"> |
| <!-- This histogram was expired between 2022-11-02 and M111 --> |
| |
| <owner>marq@chromium.org</owner> |
| <owner>olivierrobin@chromium.org</owner> |
| <summary> |
| [iOS] The number of tabs opened when the app comes out of the background. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.CountAtStartup" units="tabs" expires_after="2023-09-10"> |
| <owner>marq@chromium.org</owner> |
| <owner>chromeleon@google.com</owner> |
| <summary>[Android and iOS] The number of tabs opened at cold launch.</summary> |
| </histogram> |
| |
| <histogram name="Tabs.DuplicatesCountAtStartup" units="tabs" |
| expires_after="2024-01-15"> |
| <owner>pakzhygitov@google.com</owner> |
| <owner>chromeleon@google.com</owner> |
| <summary> |
| [iOS] The number of duplicated tabs restored at cold launch. |
| |
| Note: This metric counts each non-unique tab as a duplicate. E.g. if there |
| are 3 tabs with the same URL, this metric will reprepresnet the amount of |
| total duplicates (i.e. two duplicates). |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.FirstSwitchedToForegroundCreationRank" units="units" |
| expires_after="M77"> |
| <owner>pkotwicz@chromium.org</owner> |
| <summary> |
| Records the "Tab Creation Rank" for the first background tab which |
| was switched to the foreground. The "Tab Creation Rank" is |
| relative to other background tabs which were opened from the same URL via |
| the context menu. The oldest background tab has a rank of zero. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.FirstSwitchedToForegroundCreationReverseRank" |
| units="units" expires_after="M77"> |
| <owner>pkotwicz@chromium.org</owner> |
| <summary> |
| Records the "Reverse Tab Creation Rank" for the first background |
| background tab which was switched to the foreground. The "Reverse Tab |
| Creation Rank" is relative to other background tabs which were opened |
| from the same URL via the context menu. The newest background tab has a |
| "Reverse Tab Creation Rank" of zero. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.InactiveCountAtStartup" units="tabs" |
| expires_after="2023-10-01"> |
| <owner>alionadangla@chromium.org</owner> |
| <owner>lpromero@chromium.org</owner> |
| <owner>chromeleon@google.com</owner> |
| <summary> |
| [iOS] Records the number of tabs that are considered inactive as per the |
| current tab inactivity threshold. This is recorded at cold launch. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.LiveNTPCountAtResume" units="tabs" |
| expires_after="2024-02-26"> |
| <owner>thegreenfrog@chromium.org</owner> |
| <owner>bling-team@google.com</owner> |
| <summary> |
| [iOS] The number of live allocated regular (not incognito) NTP tabs when the |
| app comes out of a background state. A live NTP is one whose UI classes are |
| initialized. Prior to M99 this incorrectly counted whichever interface |
| (regular or incognito) was selected. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.MaxTabsInADay{BatteryState}" units="tabs" |
| expires_after="never"> |
| <!-- expires-never: https://crbug.com/966137 --> |
| |
| <owner>chrisha@chromium.org</owner> |
| <owner>fdoray@chromium.org</owner> |
| <owner>catan-team@chromium.org</owner> |
| <summary> |
| The maximum number of tabs that Chrome displays at the same time over the |
| course of a day. Desktop only. |
| |
| NOTE: This metric is asynchronous, the value reported on a given day |
| represents the previous day's observations (which can be from a different |
| build). |
| </summary> |
| <token key="BatteryState" variants="BatteryState"/> |
| </histogram> |
| |
| <histogram name="Tabs.MaxTabsPerWindowInADay{BatteryState}" units="tabs" |
| expires_after="never"> |
| <!-- expires-never: https://crbug.com/966137 --> |
| |
| <owner>chrisha@chromium.org</owner> |
| <owner>fdoray@chromium.org</owner> |
| <owner>catan-team@chromium.org</owner> |
| <summary> |
| The maximum number of tabs per window that Chrome displays over the course |
| of a day. Desktop Only. |
| |
| NOTE: This metric is asynchronous, the value reported on a given day |
| represents the previous day's observations (which can be from a different |
| build). |
| </summary> |
| <token key="BatteryState" variants="BatteryState"/> |
| </histogram> |
| |
| <histogram name="Tabs.MaxWindowsInADay{BatteryState}" units="tabs" |
| expires_after="never"> |
| <!-- expires-never: https://crbug.com/966137 --> |
| |
| <owner>chrisha@chromium.org</owner> |
| <owner>fdoray@chromium.org</owner> |
| <owner>catan-team@chromium.org</owner> |
| <summary> |
| The maximum number of windows existing at the same time over the course of a |
| day. Desktop only. |
| |
| NOTE: This metric is asynchronous, the value reported on a given day |
| represents the previous day's observations (which can be from a different |
| build). |
| </summary> |
| <token key="BatteryState" variants="BatteryState"/> |
| </histogram> |
| |
| <histogram name="Tabs.NewNavigationWithSameOriginTab" enum="Boolean" |
| expires_after="2023-10-08"> |
| <owner>gjc@google.com</owner> |
| <owner>blink-network-dev@chromium.org</owner> |
| <summary> |
| Whether another tab under the same origin can be found when a tab has |
| finished a navigation to a new security origin. This can happen when a new |
| tab is added with a website or the user navigates to another security |
| origin. The browser will iterate over all the tabs to find if there is a tab |
| with content under the same origin as the new link. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.NTPCountAtResume" units="tabs" expires_after="2023-10-08"> |
| <owner>gogerald@chromium.org</owner> |
| <owner>nasims@google.com</owner> |
| <summary> |
| [iOS] The number of NTP tabs open when the app comes out of the background. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.NTPCountAtStartup" units="tabs" |
| expires_after="2023-09-17"> |
| <owner>gogerald@chromium.org</owner> |
| <owner>nasims@google.com</owner> |
| <summary>[iOS] The number of NTP tabs open at cold launch.</summary> |
| </histogram> |
| |
| <histogram name="Tabs.NumberOfTabsOnResume{BatteryState}" units="tabs" |
| expires_after="never"> |
| <!-- expires-never: https://crbug.com/966137 --> |
| |
| <owner>chrisha@chromium.org</owner> |
| <owner>fdoray@chromium.org</owner> |
| <owner>catan-team@chromium.org</owner> |
| <summary> |
| The number of tabs total at resume from sleep/hibernate. This is being |
| logged on all desktop platforms. |
| </summary> |
| <token key="BatteryState" variants="BatteryState"/> |
| </histogram> |
| |
| <histogram name="Tabs.OldCountAtStartup" units="tabs" |
| expires_after="2023-10-01"> |
| <owner>alionadangla@chromium.org</owner> |
| <owner>lpromero@chromium.org</owner> |
| <owner>chromeleon@google.com</owner> |
| <summary> |
| [iOS] Number of tabs older than 21 days. Recorded at cold launch. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.PersistedTabData.Critical.Map.Success" |
| enum="BooleanSuccess" expires_after="2024-01-08"> |
| <owner>davidjm@chromium.org</owner> |
| <owner>dtrainor@chromium.org</owner> |
| <owner>nyquist@chromium.org</owner> |
| <summary> |
| CriticalPersistedTabData persists core Tab metadata (tab id, web contents |
| etc.) across restarts. This metric records if the Tab metadata is |
| successfully mapped from raw storage into an object which can be consumed in |
| Tab restoration. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.PersistedTabData.Deserialize.Critical" |
| enum="BooleanSuccess" expires_after="2023-06-19"> |
| <!-- P2 project which hasn't launched yet --> |
| |
| <owner>yusufo@chromium.org</owner> |
| <owner>nyquist@chromium.org</owner> |
| <owner>dtrainor@chromium.org</owner> |
| <owner>davidjm@chromium.org</owner> |
| <summary> |
| CriticalPersistedTabData stores data pertinent to the running of the app |
| such as tab id, parent id, web contents. This data is serialized and stored |
| across restarts. This records if the deserialization succeeds or fails. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.PersistedTabData.Serialize.Critical" |
| enum="BooleanSuccess" expires_after="2024-01-08"> |
| <owner>yusufo@chromium.org</owner> |
| <owner>nyquist@chromium.org</owner> |
| <owner>dtrainor@chromium.org</owner> |
| <owner>davidjm@chromium.org</owner> |
| <summary> |
| CriticalPersistedTabData stores data pertinent to the running of the app |
| such as tab id, parent id, web contents. This data is serialized and stored |
| across restarts. This records if the serialization succeeds or fails. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.PersistedTabData.Storage.Delete.File" |
| enum="BooleanSuccess" expires_after="2023-06-20"> |
| <owner>yusufo@chromium.org</owner> |
| <owner>nyquist@chromium.org</owner> |
| <owner>dtrainor@chromium.org</owner> |
| <owner>davidjm@chromium.org</owner> |
| <summary> |
| FilePersistedTabData storage stores serialized PersistedTabData (metadata |
| persisted across restarts) in a file. This metric records if a delete was |
| successful or unsuccessful. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.PersistedTabData.Storage.Exists.File" |
| enum="BooleanSuccess" expires_after="2023-06-19"> |
| <owner>yusufo@chromium.org</owner> |
| <owner>nyquist@chromium.org</owner> |
| <owner>dtrainor@chromium.org</owner> |
| <owner>davidjm@chromium.org</owner> |
| <summary> |
| FilePersistedTabData storage stores serialized PersistedTabData (metadata |
| persisted across restarts) in a file. This metric records if a delete |
| operation was found to have the file not existing. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.PersistedTabData.Storage.LevelDB.OrphanedDataCount" |
| units="keys" expires_after="2023-06-27"> |
| <owner>davidjm@chromium.org</owner> |
| <owner>dtrainor@chromium.org</owner> |
| <summary> |
| Records the number of keys that were identified to be orphaned in the |
| LevelDB database for PersistedTabData. PersistedTabData stores Tab data to |
| be persisted across restarts. When a Tab is closed, the data is removed, |
| however, it is possible for data to become orphaned if the app crashes after |
| a Tab is closed and before the cleanup is complete. This metric is recorded |
| in the first callback, OnPerformMaintenance, whereby orphaned keys are |
| identified and before they are deleted. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.PersistedTabData.Storage.LoadAndMapTime.File" units="ms" |
| expires_after="2024-01-08"> |
| <owner>davidjm@chromium.org</owner> |
| <owner>dtrainor@chromium.org</owner> |
| <owner>nyquist@chromium.org</owner> |
| <summary> |
| PersistedTabData stores Tab related data across restarts in a number of |
| storage options. This metric stores the time to load Tab data from file |
| storage and map it into an object available for consumption on Tab |
| restoration. The only client currently using File storage is |
| CriticalPersistedTabData which persists core Tab metadata (tab id, web |
| contents etc.) across restarts. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.PersistedTabData.Storage.LoadTime.File" units="ms" |
| expires_after="2024-01-08"> |
| <owner>yusufo@chromium.org</owner> |
| <owner>nyquist@chromium.org</owner> |
| <owner>dtrainor@chromium.org</owner> |
| <owner>davidjm@chromium.org</owner> |
| <summary> |
| FilePersistedTabData storage stores serialized PersistedTabData (metadata |
| persisted across restarts) in a file. This metric records how long it took |
| to load the file in the event the file exists. . |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.PersistedTabData.Storage.MapTime.File" units="ms" |
| expires_after="2024-01-08"> |
| <owner>davidjm@chromium.org</owner> |
| <owner>dtrainor@chromium.org</owner> |
| <owner>nyquist@chromium.org</owner> |
| <summary> |
| PersistedTabData stores Tab related data across restarts in a number of |
| storage options. This metric stores the time to map data acquired from raw |
| file storage into an object which can be consumed on Tab restoration. The |
| only client currently using File storage is CriticalPersistedTabData which |
| persists core Tab metadata (tab id, web contents etc.) across restarts. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.PersistedTabData.Storage.Restore.File" |
| enum="BooleanSuccess" expires_after="2023-11-21"> |
| <owner>yusufo@chromium.org</owner> |
| <owner>nyquist@chromium.org</owner> |
| <owner>dtrainor@chromium.org</owner> |
| <owner>davidjm@chromium.org</owner> |
| <summary> |
| FilePersistedTabData storage stores serialized PersistedTabData (metadata |
| persisted across restarts) in a file. This metric records if a restore was |
| successful or unsuccessful. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.PersistedTabData.Storage.Save.File" enum="BooleanSuccess" |
| expires_after="2024-01-08"> |
| <owner>yusufo@chromium.org</owner> |
| <owner>nyquist@chromium.org</owner> |
| <owner>dtrainor@chromium.org</owner> |
| <owner>davidjm@chromium.org</owner> |
| <summary> |
| FilePersistedTabData storage stores serialized PersistedTabData (metadata |
| persisted across restarts) in a file. This metric records if a save was |
| successful or unsuccessful. |
| </summary> |
| </histogram> |
| |
| <histogram |
| name="Tabs.PersistedTabData.Storage.Save.File.FirstStorageRequestType" |
| enum="FileStorageRequestType" expires_after="2023-08-20"> |
| <owner>yusufo@chromium.org</owner> |
| <owner>nyquist@chromium.org</owner> |
| <owner>dtrainor@chromium.org</owner> |
| <owner>davidjm@chromium.org</owner> |
| <summary> |
| First storage request type in FilePersistedTabData. It would be expected |
| that the first storage request will be a restore (as restoring the active |
| tab) is pivotal for startup performance. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.PersistedTabData.Storage.SaveTime.File" units="ms" |
| expires_after="2024-04-10"> |
| <owner>yusufo@chromium.org</owner> |
| <owner>nyquist@chromium.org</owner> |
| <owner>dtrainor@chromium.org</owner> |
| <owner>davidjm@chromium.org</owner> |
| <summary> |
| FilePersistedTabData storage stores serialized PersistedTabData (metadata |
| persisted across restarts) in a file. This metric records how long it took |
| to save the file in the event of a successful save. |
| </summary> |
| </histogram> |
| |
| <histogram |
| name="Tabs.RecentlyClosed.EntriesRestoredInPage.{RecentlyClosedType}" |
| units="entries restored" expires_after="2023-08-05"> |
| <owner>ckitagawa@chromium.org</owner> |
| <owner>fredmello@chromium.org</owner> |
| <summary> |
| The number of distinct entries from TabRestoreService of |
| {RecentlyClosedType} type that were restored in one Recent Tabs page session |
| on Android. This is recorded when destroying the Recent Tabs page if any |
| entires of {RecentlyClosedType} type were shown. |
| </summary> |
| <token key="RecentlyClosedType" variants="RecentlyClosedType"/> |
| </histogram> |
| |
| <histogram name="Tabs.RecentlyClosed.EntriesShownInPage.{RecentlyClosedType}" |
| units="entries shown" expires_after="2023-08-05"> |
| <owner>ckitagawa@chromium.org</owner> |
| <owner>fredmello@chromium.org</owner> |
| <summary> |
| The number of distinct entries from TabRestoreService of |
| {RecentlyClosedType} type shown in one Recent Tabs page session on Android. |
| This is recorded when destroying the Recent Tabs page. |
| </summary> |
| <token key="RecentlyClosedType" variants="RecentlyClosedType"/> |
| </histogram> |
| |
| <histogram name="Tabs.RecentlyClosed.HistoricalSaverCloseType" |
| enum="HistoricalSaverCloseType" expires_after="2023-08-05"> |
| <owner>ckitagawa@chromium.org</owner> |
| <owner>fredmello@chromium.org</owner> |
| <summary> |
| Recorded once for each tab closure event processed by HistoricalTabSaverImpl |
| on Android. Enum categories correspond to the the type of closure that was |
| saved to the native TabRestoreService. Tab for single tab, Group for a |
| single tab group and Bulk for a combination of tabs and groups or more than |
| one of either. |
| </summary> |
| </histogram> |
| |
| <histogram |
| name="Tabs.RecentlyClosed.PercentOfEntriesRestoredInPage.{RecentlyClosedType}" |
| units="percentage restored" expires_after="2023-08-05"> |
| <owner>ckitagawa@chromium.org</owner> |
| <owner>fredmello@chromium.org</owner> |
| <summary> |
| The percentage of entries from TabRestoreService of {RecentlyClosedType} |
| type that were restored relative to the number shown in one Recent Tabs page |
| session on Android. This is recorded when destroying the Recent Tabs page if |
| any entires of {RecentlyClosedType} type were shown. |
| </summary> |
| <token key="RecentlyClosedType" variants="RecentlyClosedType"/> |
| </histogram> |
| |
| <histogram name="Tabs.RestoredFromInactiveCount" units="tabs" |
| expires_after="2024-02-23"> |
| <owner>lpromero@google.com</owner> |
| <owner>chromeleon@google.com</owner> |
| <summary> |
| Recorded on disabling Inactive Tabs (for example in case of an unlaunch). |
| The number of tabs rescued from the orphan inactive tabs browser after the |
| Inactive Tabs experimental flag has been disabled. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.RestoreTabStateException" enum="RestoreTabStateException" |
| expires_after="2023-08-27"> |
| <owner>ckitagawa@chromium.org</owner> |
| <owner>fredmello@chromium.org</owner> |
| <summary> |
| [Android] TabState restoration may fail resulting in fallback restoration |
| from the TabStateList or aborting restoration altogether. TabState |
| restoration occurs on startup when restoring tab state from disk or when |
| merging multi-instance modes together. This histogram is emitted when |
| TabState restoration fails to indicate the cause of the failure. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.SadTab.Feedback.Event" enum="SadTabEvent" |
| expires_after="2023-09-10"> |
| <owner>sonnyrao@chromium.org</owner> |
| <owner>jamescook@chromium.org</owner> |
| <summary> |
| Counts of events from the style of sad tab which has a feedback button as |
| its primary action. Currently, events include being displayed (actually |
| visible in a window), and the actions a user can take on the page. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.SadTab.Reload.Event" enum="SadTabEvent" |
| expires_after="2023-09-03"> |
| <owner>sonnyrao@chromium.org</owner> |
| <owner>jamescook@chromium.org</owner> |
| <summary> |
| Counts of events from the style of sad tab which has a reload button as its |
| primary action. Compare to Tabs.SadTab.Feedback.Event. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.SadTab.ReloadCount" units="tabs" |
| expires_after="2021-06-01"> |
| <owner>sonnyrao@chromium.org</owner> |
| <owner>jamescook@chromium.org</owner> |
| <summary> |
| The number of times a tab was reloaded because it was killed (usually by the |
| kernel OOM killer) and the user clicked on it later, recorded once per |
| reload event. For example, a user who clicks on 3 discarded tabs will record |
| a count in the 1 bin, 2 bin, and 3 bin. Thus each bin N is the number of |
| sessions where users experienced N or more reload events. Compare to |
| Tabs.Discard.DiscardCount. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.SavedTabLoadTime.{SavedTabMethod}.{SavedTabLoadResult}" |
| units="ms" expires_after="2023-05-30"> |
| <owner>davidjm@chromium.org</owner> |
| <owner>nyquist@chromium.org</owner> |
| <owner>dtrainor@chromium.org</owner> |
| <owner>yusufo@chromium.org</owner> |
| <summary> |
| Records load time of a Tab using {SavedTabMethod} storage and whether the |
| {SavedTabLoadResult} |
| </summary> |
| <token key="SavedTabMethod"> |
| <variant name="CriticalPersistedTabData" |
| summary="CriticalPersistedTabData"/> |
| <variant name="TabState" summary="TabState"/> |
| </token> |
| <token key="SavedTabLoadResult"> |
| <variant name="Exists" summary="Tab storage file was found."/> |
| <variant name="Null" summary="Tab storage file was not found."/> |
| </token> |
| </histogram> |
| |
| <histogram name="Tabs.ScrubbedInInterval.KeyPress" units="tabs" |
| expires_after="2023-05-07"> |
| <owner>corising@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| This histogram records the number of tabs that are 'scrubbed' by key press |
| during a given interval of time (i.e. ctrl+tab navigation). For this metric, |
| a tab is considered 'scrubbed' if it was active for less than or equal to a |
| given amount of time. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.ScrubbedInInterval.MousePress" units="tabs" |
| expires_after="2023-07-09"> |
| <owner>corising@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| This histogram records the number of tabs that are 'scrubbed' by mouse press |
| during a given interval of time. For this metric, a tab is considered |
| 'scrubbed' if it was active for less than or equal to a given amount of |
| time. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.ScrubDistance" units="tabs" expires_after="2024-03-20"> |
| <owner>afakhry@chromium.org</owner> |
| <owner>tclaiborne@chromium.org</owner> |
| <summary> |
| The distance a user multi-finger scrubbed to change tabs. Always positive |
| (ignores left / right). |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.ScrubDuration" units="ms" expires_after="2023-08-20"> |
| <owner>afakhry@chromium.org</owner> |
| <owner>tclaiborne@chromium.org</owner> |
| <summary> |
| The duration a user spent doing multi-finger scrubbing to change tabs before |
| a different tab than the currently active one was actually activated. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.ShoppingPersistedTabData.FoundBuyableProductAnnotation" |
| enum="FoundBuyableProductAnnotation" expires_after="2024-01-08"> |
| <owner>yusufo@chromium.org</owner> |
| <owner>ayman@chromium.org</owner> |
| <owner>davidjm@chromium.org</owner> |
| <summary> |
| Records if we find a BuyableProductAnnotation in the response from our |
| endpoint which provides page annotations to enrich the user experience. The |
| endpoint is called for every Tab when we enter the Tab grid switcher and is |
| cached with a time to live of 1 hour. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.Startup.TabCount.{TabType}" units="count" |
| expires_after="2024-01-08"> |
| <owner>davidjm@chromium.org</owner> |
| <owner>nyquist@chromium.org</owner> |
| <summary>Records the number of {TabType} Tabs loaded on startup.</summary> |
| <token key="TabType"> |
| <variant name="Incognito" summary="Incognito"/> |
| <variant name="Regular" summary="Regular"/> |
| </token> |
| </histogram> |
| |
| <histogram name="Tabs.StateTransfer.NumberOfOtherTabsActivatedBeforeMadeActive" |
| units="tabs" expires_after="M77"> |
| <owner>kouhei@chromium.org</owner> |
| <owner>tzik@chromium.org</owner> |
| <summary> |
| Recorded once per tab activation. The number of tabs that were activated |
| while the tab was inactive. |
| |
| This metric is to be removed after M46 hits stable. We don't expect this |
| metric to change over release, so we will remove this once we have the |
| numbers from stable. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.StateTransfer.TabDistanceInactiveToActive" units="tabs" |
| expires_after="M85"> |
| <owner>kouhei@chromium.org</owner> |
| <owner>tzik@chromium.org</owner> |
| <summary> |
| Number of tabs between the previously active tab and the new active tab. |
| |
| This metric is to be removed after M46 hits stable. We don't expect this |
| metric to change over release, so we will remove this once we have the |
| numbers from stable. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.Suggestions.NumSuggestionsChanged{TabSuggestionType}" |
| units="count" expires_after="2023-10-16"> |
| <owner>yusufo@chromium.org</owner> |
| <owner>davidjm@chromium.org</owner> |
| <owner>meiliang@chromium.org</owner> |
| <summary> |
| The user is presented with recommendations on which Tabs they could take the |
| suggested action. The user has the option to: 1) Remove a Tab from the |
| recommendation 2) Add a Tab which wasn't in the recommendation to the |
| recommendation. |
| |
| This metric records the sum of the number of times the user does 1) or 2) |
| and is a measure of how useful the recommendation is. This metric is |
| recorded after the user accepts a recommendation - potentially with edits by |
| performing 1) or 2). |
| |
| Note: Adding and removing the same Tab, or vice versa, would be counted as |
| 0. {TabSuggestionType} |
| </summary> |
| <token key="TabSuggestionType"> |
| <variant name=".ClosingSuggestion" |
| summary="This bukect is for the closing suggestion. It suggests users |
| to close the recommended tabs."/> |
| <variant name=".GroupingSuggestion" |
| summary="This bukect is for the grouping suggestion. It suggests |
| users to group the recommended tabs."/> |
| </token> |
| </histogram> |
| |
| <histogram name="Tabs.TabCountActiveWindow" units="tabs" expires_after="never"> |
| <!-- expires-never: usage drives tab optimization and analysis. --> |
| |
| <owner>markchang@google.com</owner> |
| <summary> |
| The number of tabs open in the active window when a load completes. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabCountInGroupPerLoad" units="tabs" |
| expires_after="2023-06-18"> |
| <owner>dpenning@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| The number of tabs in the current active group when a load completes. |
| Records 0 if the active tab is not in a group. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabCountPerDomainPerLoad.{TotalTabCountBucket}" |
| units="tabs" expires_after="2021-06-30"> |
| <owner>dpenning@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| The number of tabs across all browsers (counting app-mode windows) with the |
| same host piece when a load completes. {TotalTabCountBucket} is inclusive |
| and describes the total number of tabs when logging. |
| </summary> |
| <token key="TotalTabCountBucket"> |
| <variant name="0to5" summary=""/> |
| <variant name="6to10" summary=""/> |
| <variant name="10to15" summary=""/> |
| <variant name="16to20" summary=""/> |
| <variant name="21to30" summary=""/> |
| <variant name="31to40" summary=""/> |
| <variant name="41to60" summary=""/> |
| <variant name="61to80" summary=""/> |
| <variant name="81to100" summary=""/> |
| <variant name="101to150" summary=""/> |
| <variant name="151to200" summary=""/> |
| <variant name="201to300" summary=""/> |
| <variant name="301to400" summary=""/> |
| <variant name="401to500" summary=""/> |
| <variant name="500+" summary=""/> |
| </token> |
| </histogram> |
| |
| <histogram name="Tabs.TabCountPerLoad" units="tabs" expires_after="2023-08-27"> |
| <owner>mpearson@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <owner>sbirch@google.com</owner> |
| <summary> |
| The number of tabs open in all browsers (counting app-mode windows) when a |
| load completes. |
| |
| This is basically the average number of tabs over time. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabCountPerWindow" units="tabs" |
| expires_after="2023-08-27"> |
| <owner>mpearson@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| The number of tabs open per window (counting app-mode windows) when a load |
| completes. |
| |
| This value will be recorded multiple times per load if more than one window |
| is open. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabCount{BatteryState}" units="tabs" |
| expires_after="never"> |
| <!-- expires-never: https://crbug.com/966137 --> |
| |
| <owner>chrisha@chromium.org</owner> |
| <owner>fdoray@chromium.org</owner> |
| <owner>catan-team@chromium.org</owner> |
| <summary> |
| Counts the number of tabs across all windows, reported every 5 minutes. |
| Desktop only. |
| </summary> |
| <token key="BatteryState" variants="BatteryState"/> |
| </histogram> |
| |
| <histogram name="Tabs.TabOffsetOfSwitch{TabOffsetOfSwitchComponentList}" |
| units="units" expires_after="M85"> |
| <owner>yusufo@chromium.org</owner> |
| <summary> |
| How many tabs a user moved forward or backward in the Android tab switcher. |
| {TabOffsetOfSwitchComponentList} |
| |
| Logged by the Android tab switcher when a user switches tabs (other than by |
| opening a new tab). If the user switches to an earlier tab in the stack, we |
| log a positive offset value indicating how many tabs back they moved. If the |
| user switches to a later tab, we log a negative offset value. If the user |
| stays on the same tab, we log 0. If the user switches to a tab in a |
| different stack (i.e. they switch from normal to incognito or vice-versa), |
| we don't log a value. |
| </summary> |
| <token key="TabOffsetOfSwitchComponentList"> |
| <variant name=".GridTabSwitcher" summary="Tab switcher in grid layout"/> |
| <variant name=".TabStrip" summary="The TabStrip componets"/> |
| </token> |
| </histogram> |
| |
| <histogram name="Tabs.TabRestoreMethod" enum="TabRestoreMethod" |
| expires_after="2023-08-27"> |
| <owner>davidjm@chromium.org</owner> |
| <owner>dtrainor@chromium.org</owner> |
| <owner>nyquist@chromium.org</owner> |
| <summary> |
| CriticalPersistedTabData is a schema based Tab restoration system which |
| persists Tab metadata such as web contents and time last accessed across |
| restarts. CriticalPersistedTabData will replace legacy hand-written |
| TabState. |
| |
| This metric records how many Tabs are restored using |
| CriticalPersistedTabData, TabState, are re-created, skipped or failed to be |
| restored. As we migrate from TabState to CriticalPersistedTabData it is |
| imperative we can compare the success rate of each system vs. how many Tabs |
| are re-created or failed to be restored. This metric is emitted once for |
| each Tab restoration on startup. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.CloseAction" enum="TabSearchCloseActions" |
| expires_after="2023-12-13"> |
| <owner>tluk@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <summary> |
| Tab Search is a feature that allows users to better search for and switch to |
| their desired tabs. The Tab Search UI is shown in a bubble anchored to an |
| element of the UI in the browser window. |
| |
| The bubble is dismissed when it loses focus or the escape key is pressed. |
| This metric tracks if the UI bubble was dismissed as a result of an action |
| taken from within the UI (such as switching to an open tab) or dismissed |
| without direct interaction with the Tab Search UI. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.Mojo.SwitchToTab" units="ms" |
| expires_after="2023-12-13"> |
| <owner>kerenzhu@chromium.org</owner> |
| <owner>romanarora@chromium.org</owner> |
| <owner>yuhengh@chromium.org</owner> |
| <owner>tluk@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <summary> |
| The time taken to switch tab. This is measured as the time from when the |
| user clicks a tab in Tab Search to when the browser finishes switching tab. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.Mojo.SwitchToTab.IsOverlap" enum="Boolean" |
| expires_after="2023-12-13"> |
| <owner>kerenzhu@chromium.org</owner> |
| <owner>romanarora@chromium.org</owner> |
| <owner>yuhengh@chromium.org</owner> |
| <owner>tluk@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <summary> |
| Records whether there's a pending Tabs.TabSearch.Mojo.SwitchToTab |
| measurement when a new measurement is requested. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.Mojo.TabUpdated" units="ms" |
| expires_after="2023-12-13"> |
| <owner>kerenzhu@chromium.org</owner> |
| <owner>romanarora@chromium.org</owner> |
| <owner>yuhengh@chromium.org</owner> |
| <owner>tluk@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <summary> |
| The time taken for Tab Search to update its tab list when the browser's tab |
| strip model changes. This is measured as the time from when the browser |
| emits a notification to when the WebUI updates its state. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.Mojo.TabUpdated.IsOverlap" enum="Boolean" |
| expires_after="2023-12-13"> |
| <owner>kerenzhu@chromium.org</owner> |
| <owner>romanarora@chromium.org</owner> |
| <owner>yuhengh@chromium.org</owner> |
| <owner>tluk@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <summary> |
| Records whether there's a pending Tabs.TabSearch.Mojo.TabUpdated measurement |
| when a new measurement is requested. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.NumTabsClosedPerInstance" units="tabs" |
| expires_after="2023-12-13"> |
| <owner>tluk@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <summary> |
| Tab Search is a feature that allows users to better search their browsers |
| for their desired tabs and close any currently open tabs. This records the |
| number of tabs closed from a single instance of the UI (the number of tabs |
| closed from within Tab Search in the time between when the UI is open and |
| when it is closed). |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.NumTabsOnOpen" units="tabs" |
| expires_after="2023-12-13"> |
| <owner>tluk@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <summary> |
| Tab Search is a feature that allows users to better search their browsers |
| for their desired tabs. It can be opened and closed. This records the number |
| of tabs there are in the payload Tab Search is sent when it is first opened. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.NumWindowsOnOpen" units="windows" |
| expires_after="2023-12-13"> |
| <owner>tluk@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <summary> |
| Tab Search is a feature that allows users to better search their browsers |
| for their desired tabs. It can be opened and closed. This records the number |
| of windows there are in the payload Tab Search is sent when it is first |
| opened. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.OpenAction" enum="TabSearchOpenActions" |
| expires_after="2023-12-13"> |
| <owner>tluk@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <summary> |
| Tab Search is a feature that allows users to better search for and switch to |
| their desired tabs. The Tab Search UI is shown in a bubble anchored to an |
| element of the UI in the browser window. |
| |
| The bubble can be invoked via a number of different means including mouse |
| click, keyboard navigation, keyboard shortcut or touch gesture. This metric |
| tracks the kind of action the user took to invoke the Tab Search bubble UI. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.PageHandlerConstructionDelay" units="ms" |
| expires_after="2023-12-13"> |
| <owner>tluk@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <owner>yuhengh@chromium.org</owner> |
| <owner>romanarora@chromium.org</owner> |
| <summary> |
| Tab Search is a feature that allows users to better search for and switch to |
| their desired tabs. The Tab Search UI is shown in a bubble anchored to an |
| element of the UI in the browser window. |
| |
| When the WebUIController is first created it waits for the WebUI code in the |
| renderer process to request the creation of the TabSearchPageHandler. This |
| metric tracks the time between when the WebUIController was constructed to |
| when the TabSearchPageHandler begins construction. This metric is emitted |
| right before the TabSearchPageHandler's constructor is called. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.RecentlyClosedSectionToggleAction" |
| enum="TabSearchRecentlyClosedToggleActions" expires_after="2023-12-13"> |
| <owner>romanarora@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <owner>tluk@chromium.org</owner> |
| <owner>yuhengh@chromium.org</owner> |
| <summary> |
| Tab Search is a feature that allows users to better search for and switch to |
| their desired tabs. The Tab Search UI displays both open and recently closed |
| tabs under different list sections. The recently closed section can be |
| expanded or collapsed by the user by clicking a button. |
| |
| This metric tracks the recently closed section being expandeded or collapsed |
| via the toggle button. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.RecentlyClosedSectionToggleStateOnOpen" |
| enum="TabSearchRecentlyClosedToggleActions" expires_after="2023-12-13"> |
| <owner>romanarora@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <owner>tluk@chromium.org</owner> |
| <owner>yuhengh@chromium.org</owner> |
| <summary> |
| Tab Search is a feature that allows users to better search for and switch to |
| their desired tabs. The Tab Search UI displays both open and recently closed |
| tabs under different list sections. The recently closed section can be |
| expanded or collapsed by the user by clicking a button. |
| |
| This metric tracks if the recently closed section is in an expanded or |
| collapsed state at the time of opening the Tab Search dialog. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.WebUI.IndexOf{Action}In{State}List" |
| units="tabs" expires_after="2023-12-13"> |
| <owner>tluk@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <owner>yuhengh@chromium.org</owner> |
| <owner>romanarora@chromium.org</owner> |
| <summary> |
| Tab Search is a feature that allows users to better search their browsers |
| for their desired tabs and close any currently open tabs. |
| |
| This records the index at which a {Action} has been performed on a tab in |
| Tab Search's tab list in a {State} state. |
| </summary> |
| <token key="Action"> |
| <variant name="CloseTab"/> |
| <variant name="OpenRecentlyClosedEntry"/> |
| <variant name="SwitchTab"/> |
| </token> |
| <token key="State"> |
| <variant name="Filtered" summary="Filtered by user search query."/> |
| <variant name="Unfiltered" summary="Unfiltered by user search query."/> |
| </token> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.WebUI.LoadCompletedTime" units="ms" |
| expires_after="2023-12-13"> |
| <owner>tluk@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <summary> |
| The amount of time between the RenderFrameHost StartProvisionalLoad event |
| and the RenderFrameHost DocumentOnLoadCompleted event for the Tab Search |
| WebUI page. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.WebUI.LoadDocumentTime" units="ms" |
| expires_after="2023-12-13"> |
| <owner>tluk@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <summary> |
| The amount of time between the RenderFrameHost StartProvisionalLoad and |
| DidFinishDocumentLoad events for the Tab Search WebUI page. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.WebUI.RecentlyClosed{Item}OpenAction" |
| enum="TabSearchRecentlyClosedItemOpenAction" expires_after="2023-12-13"> |
| <owner>tluk@chromium.org</owner> |
| <owner>chrome-cros@chromium.org</owner> |
| <summary> |
| Tab Search is a feature that allows users to better search their browsers |
| for their desired tabs or recently closed tabs and tab groups. This records |
| whether the user used Tab Search to open a recently closed {Item} from a |
| filtered search results list or the default unfiltered list. |
| </summary> |
| <token key="Item"> |
| <variant name="Group"/> |
| <variant name="Tab"/> |
| </token> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.WebUI.SearchAlgorithmDuration" units="ms" |
| expires_after="2023-12-13"> |
| <owner>yuhengh@chromium.org</owner> |
| <owner>chrome-cros@chromium.org</owner> |
| <summary> |
| The time taken to run the search algorithm. The algorithm takes an |
| unfiltered list of items and user search query as inputs, then generate a |
| list of filtered items as output. Recorded after the measurement ends. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.WebUI.TabListDataReceived" units="ms" |
| expires_after="2023-12-13"> |
| <owner>tluk@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <owner>yuhengh@chromium.org</owner> |
| <summary> |
| The time taken for the WebUI in the renderer to receive the full list of |
| tabs for the current user profile. This is measured as the time from when |
| the data was first requested by the WebUI to when the data was received by |
| the WebUI. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.WebUI.TabListDataReceived2" units="ms" |
| expires_after="2023-12-13"> |
| <owner>kerenzhu@chromium.org</owner> |
| <owner>tluk@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <owner>yuhengh@chromium.org</owner> |
| <owner>kerenzhu@chromium.org</owner> |
| <summary> |
| The time taken for the WebUI in the renderer to receive the full list of |
| tabs for the current user profile. This is measured as the time from when |
| the data was first requested by the WebUI to when the data was received by |
| the WebUI. |
| |
| This metric is recorded by MetricsReporter. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.WebUI.TabListDataReceived2.IsOverlap" |
| enum="Boolean" expires_after="2023-12-13"> |
| <owner>kerenzhu@chromium.org</owner> |
| <owner>tluk@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <owner>yuhengh@chromium.org</owner> |
| <owner>kerenzhu@chromium.org</owner> |
| <summary> |
| Records whether there's a pending Tabs.TabSearch.WebUI.TabListDataReceived2 |
| measurement when a new measurement is requested. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.WebUI.TabSwitchAction" |
| enum="TabSearchTabSwitchAction" expires_after="2023-12-13"> |
| <owner>tluk@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <summary> |
| Tab Search is a feature that allows users to better search their browsers |
| for and switch to their desired tabs. This records whether the user used Tab |
| Search to switch to a tab from a filtered search results list or the default |
| unfiltered list. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.WebUI.TimeTo{Action}In{State}List" units="ms" |
| expires_after="2023-12-13"> |
| <owner>yuhengh@chromium.org</owner> |
| <owner>chrome-cros@chromium.org</owner> |
| <summary> |
| The time taken between the tab search bubble is open and user switches to a |
| tab or opens a recently closed tab, with or without search query. Recorded |
| after the measurement ends. |
| </summary> |
| <token key="Action"> |
| <variant name="OpenRecentlyClosedEntry"/> |
| <variant name="SwitchTab"/> |
| </token> |
| <token key="State"> |
| <variant name="Filtered" summary="Filtered by user search query."/> |
| <variant name="Unfiltered" summary="Unfiltered by user search query."/> |
| </token> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.WindowDisplayedDuration3" units="ms" |
| expires_after="2023-12-13"> |
| <owner>tluk@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <summary> |
| Tab Search is a feature that allows users to better search their browsers |
| for their desired tabs. It can be opened and closed. This records the amount |
| of time between when a Tab Search bubble is opened and when it is closed. It |
| does so by recording the difference in time between when the the hosting |
| WebUIBubbleDialogView's Widget is first created and when the widget is |
| destroyed. |
| |
| The Tab Search UI is a bubble anchored to an element within a browser window |
| and is closed if the user switches to a tab, presses the escape key or |
| performs an action to return focus to the hosting window. The Tab Search UI |
| bubble will also close if the hosting browser window is closed or crashes. |
| |
| Users may leave the bubble open for long periods of time without directly |
| interacting with the UI which could result in a long tail of displayed |
| durations. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.WindowTimeToShowCachedWebView" units="ms" |
| expires_after="2023-12-13"> |
| <owner>tluk@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <owner>yuhengh@chromium.org</owner> |
| <owner>romanarora@chromium.org</owner> |
| <summary> |
| Tab Search is a feature that allows users to better search for and switch to |
| their desired tabs. The Tab Search UI is shown in a bubble anchored to an |
| element of the UI in the browser window. |
| |
| This tracks the time between when the Tab Search WebUI bubble widget is |
| first created and when it is first shown to users. This metric is only |
| logged if a previously cached WebView is used for the construction of the |
| bubble widget. This metric is emitted when the bubble window is first |
| revealed. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabSearch.WindowTimeToShowUncachedWebView" units="ms" |
| expires_after="2023-12-13"> |
| <owner>tluk@chromium.org</owner> |
| <owner>robliao@chromium.org</owner> |
| <owner>yuhengh@chromium.org</owner> |
| <owner>romanarora@chromium.org</owner> |
| <summary> |
| Tab Search is a feature that allows users to better search for and switch to |
| their desired tabs. The Tab Search UI is shown in a bubble anchored to an |
| element of the UI in the browser window. |
| |
| This tracks the time between when the Tab Search WebUI bubble widget is |
| first created and when it is first shown to users. This metric is only |
| logged if a new WebView was created for the construction of the bubble |
| widget. This metric is emitted when the bubble window is first revealed. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabsStatsDailyEventInterval" |
| enum="DailyEventIntervalType" expires_after="M77"> |
| <owner>sebmarchand@chromium.org</owner> |
| <summary> |
| Counts how often tab stats daily interval events were fired. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabState.LoadTime" units="ms" expires_after="2023-10-01"> |
| <owner>yusufo@chromium.org</owner> |
| <owner>nyquist@chromium.org</owner> |
| <owner>dtrainor@chromium.org</owner> |
| <owner>davidjm@chromium.org</owner> |
| <summary> |
| Time taken to load a TabState file in the event that it exists. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TabState.SaveTime" units="ms" expires_after="2023-06-18"> |
| <owner>yusufo@chromium.org</owner> |
| <owner>nyquist@chromium.org</owner> |
| <owner>dtrainor@chromium.org</owner> |
| <owner>davidjm@chromium.org</owner> |
| <summary> |
| Time taken to save a TabState file in the event of a successful save. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.Tasks.OrderValidOnStartup" units="boolean" |
| expires_after="2023-09-17"> |
| <owner>ckitagawa@chromium.org</owner> |
| <owner>fredmello@chromium.org</owner> |
| <summary> |
| [Android] boolean value indicating whether the invariant that tab groups are |
| contiguous holds. Recorded on cold start after all tabs are restored. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.Tasks.TabAddedWithValidProposedPosition" units="boolean" |
| expires_after="2023-09-17"> |
| <owner>ckitagawa@chromium.org</owner> |
| <owner>fredmello@chromium.org</owner> |
| <summary> |
| [Android] boolean value indicating whether a tab that was added to the |
| TabModel would have been added at the correct position if |
| TabGroupModelFilter had not interved to move it so it respected group |
| position. Recorded each time a tab is added to the TabModel. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.TimeSinceCreationAtStartup" enum="IOSAllOpenTabsAge" |
| expires_after="2024-01-15"> |
| <owner>pakzhygitov@google.com</owner> |
| <owner>chromeleon@google.com</owner> |
| <summary> |
| [iOS] The age of tabs opened at cold launch. The age of a tab is the time |
| elapsed since its creation. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.UnusedCountAtStartup" units="tabs" |
| expires_after="2024-01-15"> |
| <owner>pakzhygitov@google.com</owner> |
| <owner>chromeleon@google.com</owner> |
| <summary> |
| [iOS] The number of old/unused tabs opened at cold launch. Inactive tab is a |
| tab that has been not interacted with for more than 7 days. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.WindowCount{BatteryState}" units="windows" |
| expires_after="never"> |
| <!-- expires-never: https://crbug.com/966137 --> |
| |
| <owner>fdoray@chromium.org</owner> |
| <owner>catan-team@chromium.org</owner> |
| <summary> |
| Counts the number of Chrome windows, reported every 5 minutes. Desktop only. |
| </summary> |
| <token key="BatteryState" variants="BatteryState"/> |
| </histogram> |
| |
| <histogram name="Tabs.WindowWidth" units="DIPs" expires_after="2023-09-03"> |
| <owner>collinbaker@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| The width of each open browser window, in DIPs, reported every 5 minutes. |
| Desktop only. |
| </summary> |
| </histogram> |
| |
| <histogram name="Tabs.{TabActiveState}TabWidth" units="px" |
| expires_after="2023-12-01"> |
| <owner>dpenning@chromium.org</owner> |
| <owner>tbergquist@chromium.org</owner> |
| <summary> |
| [Desktop] The size in pixels of the {TabActiveState} tab logged when a tab |
| is added. Used to collect size data for scrolling tabs. |
| </summary> |
| <token key="TabActiveState" variants="TabActiveState"/> |
| </histogram> |
| |
| <histogram name="TabStrip.ReasonToShow" enum="TabStripReasonToShow" |
| expires_after="2021-02-01"> |
| <obsolete> |
| Removed 01/2023. Feature deprecated and code deleted. |
| </obsolete> |
| <owner>yusufo@chromium.org</owner> |
| <owner>wychen@chromium.org</owner> |
| <summary> |
| When conditional tab strip shows, records which kind of intentional |
| tab-related action triggered it. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabStrip.Tab.{Framework}.ActivationAction" |
| enum="TabActivationTypes" expires_after="2023-12-13"> |
| <owner>yuhengh@chromium.org</owner> |
| <owner>tluk@chromium.org</owner> |
| <owner>romanarora@chromium.org</owner> |
| <summary> |
| Tab activation triggered by click or touch on a tab. This is used to measure |
| tab activation count of tab strip vs WebUI tab strip. |
| </summary> |
| <token key="Framework"> |
| <variant name="Views"/> |
| <variant name="WebUI"/> |
| </token> |
| </histogram> |
| |
| <histogram name="TabStrip.TabCountOnPageLoad" units="tabs" |
| expires_after="2023-08-27"> |
| <owner>yusufo@chromium.org</owner> |
| <owner>wychen@chromium.org</owner> |
| <summary> |
| This histogram records the number of tabs within the group during page load. |
| |
| If the loading happens in a tab that does not belong to a group, we log 0. |
| Else, we log a positive number >= 2. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabStrip.TimeToCreateNewTabFromPress" units="ms" |
| expires_after="2023-09-10"> |
| <owner>robliao@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| The amount of time from receiving a new tab button pressed to creating the |
| elements necessary to represent a new tab. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabStrip.TimeToSwitch" units="ms" expires_after="2023-10-22"> |
| <owner>dpenning@chromium.org</owner> |
| <owner>chrome-desktop-ui-sea@google.com</owner> |
| <summary> |
| The amount of time from cursor entering the tabstrip to first click on a tab |
| to switch. |
| |
| This will exclude some kinds of switching (hotkeys, between windows) where |
| it would be difficult to define a start time. Entering the tabstrip is an |
| approximation which will vary between users, but should still be useful for |
| A/B comparison. |
| </summary> |
| </histogram> |
| |
| <histogram name="TabStrip.UserStatus" enum="TabStripUserStatus" |
| expires_after="2022-04-17"> |
| <obsolete> |
| Removed 01/2023. Feature deprecated and code deleted. |
| </obsolete> |
| <owner>yusufo@chromium.org</owner> |
| <owner>wychen@chromium.org</owner> |
| <summary> |
| A tab strip session starts when the last time Chrome comes to the foreground |
| was more than an hour ago. At the beginning of a tab strip session, records |
| the user status of conditional tab strip feature in the last tab strip |
| session. |
| </summary> |
| </histogram> |
| |
| </histograms> |
| |
| </histogram-configuration> |
