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Reuse a TimelineTask for the scheduler frame and animate events (#90168)

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Jason Simmons 2021-09-17 10:07:06 -07:00 committed by GitHub
parent 4889064ff5
commit c2f452c0a8
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 5 additions and 8 deletions
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2
dev/tracing_tests/test/image_cache_tracing_test.dart
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@ -55,7 +55,7 @@ void main() {
},
<String, dynamic>{
'name': 'listener',
'args': <String, dynamic>{'parentId': '0', 'isolateId': isolateId}
'args': <String, dynamic>{'isolateId': isolateId}
},
<String, dynamic>{
'name': 'ImageCache.clear',

11
packages/flutter/lib/src/scheduler/binding.dart
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@ -996,8 +996,7 @@ mixin SchedulerBinding on BindingBase {
handleDrawFrame();
}
TimelineTask? _frameTimelineTask;
TimelineTask? _animateTimelineTask;
final TimelineTask? _frameTimelineTask = kReleaseMode ? null : TimelineTask();
/// Called by the engine to prepare the framework to produce a new frame.
///
@ -1023,7 +1022,7 @@ mixin SchedulerBinding on BindingBase {
/// statements printed during a frame from those printed between frames (e.g.
/// in response to events or timers).
void handleBeginFrame(Duration? rawTimeStamp) {
_frameTimelineTask = TimelineTask()..start('Frame', arguments: timelineArgumentsIndicatingLandmarkEvent);
_frameTimelineTask?.start('Frame', arguments: timelineArgumentsIndicatingLandmarkEvent);
_firstRawTimeStampInEpoch ??= rawTimeStamp;
_currentFrameTimeStamp = _adjustForEpoch(rawTimeStamp ?? _lastRawTimeStamp);
if (rawTimeStamp != null)
@ -1050,7 +1049,7 @@ mixin SchedulerBinding on BindingBase {
_hasScheduledFrame = false;
try {
// TRANSIENT FRAME CALLBACKS
_animateTimelineTask = TimelineTask()..start('Animate', arguments: timelineArgumentsIndicatingLandmarkEvent);
_frameTimelineTask?.start('Animate', arguments: timelineArgumentsIndicatingLandmarkEvent);
_schedulerPhase = SchedulerPhase.transientCallbacks;
final Map<int, _FrameCallbackEntry> callbacks = _transientCallbacks;
_transientCallbacks = <int, _FrameCallbackEntry>{};
@ -1075,8 +1074,7 @@ mixin SchedulerBinding on BindingBase {
/// useful when working with frame callbacks.
void handleDrawFrame() {
assert(_schedulerPhase == SchedulerPhase.midFrameMicrotasks);
_animateTimelineTask?.finish(); // end the "Animate" phase
_animateTimelineTask = null;
_frameTimelineTask?.finish(); // end the "Animate" phase
try {
// PERSISTENT FRAME CALLBACKS
_schedulerPhase = SchedulerPhase.persistentCallbacks;
@ -1093,7 +1091,6 @@ mixin SchedulerBinding on BindingBase {
} finally {
_schedulerPhase = SchedulerPhase.idle;
_frameTimelineTask?.finish(); // end the Frame
_frameTimelineTask = null;
assert(() {
if (debugPrintEndFrameBanner)
debugPrint('▀' * _debugBanner!.length);