| -- |
| -- Copyright 2020 The Android Open Source Project |
| -- |
| -- Licensed under the Apache License, Version 2.0 (the "License"); |
| -- you may not use this file except in compliance with the License. |
| -- You may obtain a copy of the License at |
| -- |
| -- https://www.apache.org/licenses/LICENSE-2.0 |
| -- |
| -- Unless required by applicable law or agreed to in writing, software |
| -- distributed under the License is distributed on an "AS IS" BASIS, |
| -- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| -- See the License for the specific language governing permissions and |
| -- limitations under the License. |
| -- |
| -- A collection of metrics related to GestureScrollUpdate events. |
| -- |
| -- We define a GestureScrollUpdate to be janky if comparing forwards or |
| -- backwards (ignoring coalesced updates) a given GestureScrollUpdate exceeds |
| -- the duration of its predecessor or successor by 50% of a vsync interval |
| -- (defaulted to 60 FPS). |
| -- |
| -- WARNING: This metric should not be used as a source of truth. It is under |
| -- active development and the values & meaning might change without |
| -- notice. |
| |
| SELECT RUN_METRIC( |
| 'chrome/gesture_jank.sql', |
| 'prefix', 'scroll', |
| 'gesture_start', 'GestureScrollBegin', |
| 'gesture_update', 'GestureScrollUpdate', |
| 'gesture_end', 'GestureScrollEnd', |
| 'id_field', 'gesture_scroll_id', |
| 'proto_name', 'ScrollJank'); |
