cobalt/dom/performance.idl

// Copyright 2015 The Cobalt Authors. All Rights Reserved.
//
// 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
//
//     http://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.

// https://www.w3.org/TR/navigation-timing/#performance

interface Performance {
  readonly attribute PerformanceTiming timing;

  // Chromium custom member.
  readonly attribute MemoryInfo memory;

  // Performance Resource Timing extensions to the Performance interface.
  //   https://w3c.github.io/resource-timing/#sec-extensions-performance-interface
  void clearResourceTimings ();
  void setResourceTimingBufferSize (unsigned long maxSize);
  attribute EventHandler onresourcetimingbufferfull;

  // Web API: User Timing extensions to Performance
  //   https://www.w3.org/TR/2019/REC-user-timing-2-20190226/#extensions-performance-interface
  [RaisesException] void mark(DOMString name);
  [RaisesException] void measure(
      DOMString measureName,
      optional DOMString startMark = "",
      optional DOMString endMark = "");
  void clearMarks(optional DOMString name = "");
  void clearMeasures(optional DOMString measureName = "");
};