mirror of
https://github.com/flutter/flutter.git
synced 2025-06-03 00:51:18 +00:00
8ba459ce9f
This updates the implementation to use the stopwatch from the Clock object and pipes it through to the TestWidgetsFlutterBinding so it will be kept in sync with FakeAsync. Relands https://github.com/flutter/flutter/pull/138843 attempted to reland https://github.com/flutter/flutter/pull/137381 which attempted to reland #132291 Fixes https://github.com/flutter/flutter/issues/97761 1. The original change was reverted due to flakiness it introduced in tests that use fling gestures. * Using a mocked clock through the test binding fixes this now 2. It was reverted a second time because a change at tip of tree broke it, exposing memory leaks, but it was not rebased before landing. * These leaks are now fixed 3. It was reverted a third time, because we were so excellently quick to revert those other times, that we did not notice the broken benchmark that only runs in postsubmit. * The benchmark is now fixed
60 lines
1.9 KiB
Dart
60 lines
1.9 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
import 'package:flutter/gestures.dart';
|
|
import 'package:flutter_test/flutter_test.dart';
|
|
|
|
import '../common.dart';
|
|
import 'data/velocity_tracker_data.dart';
|
|
|
|
const int _kNumIters = 10000;
|
|
|
|
class TrackerBenchmark {
|
|
TrackerBenchmark({required this.name, required this.tracker });
|
|
|
|
final VelocityTracker tracker;
|
|
final String name;
|
|
}
|
|
|
|
Future<void> main() async {
|
|
assert(false, "Don't run benchmarks in debug mode! Use 'flutter run --release'.");
|
|
final BenchmarkResultPrinter printer = BenchmarkResultPrinter();
|
|
final List<TrackerBenchmark> benchmarks = <TrackerBenchmark>[
|
|
TrackerBenchmark(name: 'velocity_tracker_iteration',
|
|
tracker: VelocityTracker.withKind(PointerDeviceKind.touch)),
|
|
TrackerBenchmark(name: 'velocity_tracker_iteration_ios_fling',
|
|
tracker: IOSScrollViewFlingVelocityTracker(PointerDeviceKind.touch)),
|
|
];
|
|
final Stopwatch watch = Stopwatch();
|
|
|
|
await benchmarkWidgets((WidgetTester tester) async {
|
|
for (final TrackerBenchmark benchmark in benchmarks) {
|
|
print('${benchmark.name} benchmark...');
|
|
final VelocityTracker tracker = benchmark.tracker;
|
|
watch.reset();
|
|
watch.start();
|
|
for (int i = 0; i < _kNumIters; i += 1) {
|
|
for (final PointerEvent event in velocityEventData) {
|
|
if (event is PointerDownEvent || event is PointerMoveEvent) {
|
|
tracker.addPosition(event.timeStamp, event.position);
|
|
}
|
|
if (event is PointerUpEvent) {
|
|
tracker.getVelocity();
|
|
}
|
|
}
|
|
}
|
|
watch.stop();
|
|
|
|
printer.addResult(
|
|
description: 'Velocity tracker: ${tracker.runtimeType}',
|
|
value: watch.elapsedMicroseconds / _kNumIters,
|
|
unit: 'µs per iteration',
|
|
name: benchmark.name,
|
|
);
|
|
}
|
|
});
|
|
|
|
printer.printToStdout();
|
|
}
|