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This auto-formats all *.dart files in the repository outside of the `engine` subdirectory and enforces that these files stay formatted with a presubmit check. **Reviewers:** Please carefully review all the commits except for the one titled "formatted". The "formatted" commit was auto-generated by running `dev/tools/format.sh -a -f`. The other commits were hand-crafted to prepare the repo for the formatting change. I recommend reviewing the commits one-by-one via the "Commits" tab and avoiding Github's "Files changed" tab as it will likely slow down your browser because of the size of this PR. --------- Co-authored-by: Kate Lovett <katelovett@google.com> Co-authored-by: LongCatIsLooong <31859944+LongCatIsLooong@users.noreply.github.com>
91 lines
3.2 KiB
Dart
91 lines
3.2 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:js_interop';
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import 'dart:typed_data';
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import 'dart:ui' as ui;
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import 'package:web/web.dart' as web;
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import 'recorder.dart';
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// Measures the performance of image decoding.
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//
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// The benchmark measures the decoding latency and not impact on jank. It
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// cannot distinguish between blocking and non-blocking decoding. It naively
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// measures the total time it takes to decode image frames. For example, the
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// WASM codecs execute on the main thread and block the UI, leading to jank,
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// but the browser's WebCodecs API is asynchronous running on a separate thread
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// and does not jank. However, the benchmark result may be the same.
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class BenchImageDecoding extends RawRecorder {
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BenchImageDecoding() : super(name: benchmarkName, useCustomWarmUp: true);
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static const String benchmarkName = 'bench_image_decoding';
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// These test images are taken from https://github.com/flutter/flutter_gallery_assets/tree/master/lib/splash_effects
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static const List<String> _imageUrls = <String>[
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'assets/packages/flutter_gallery_assets/splash_effects/splash_effect_1.gif',
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'assets/packages/flutter_gallery_assets/splash_effects/splash_effect_2.gif',
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'assets/packages/flutter_gallery_assets/splash_effects/splash_effect_3.gif',
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];
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final List<Uint8List> _imageData = <Uint8List>[];
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@override
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Future<void> setUpAll() async {
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if (_imageData.isNotEmpty) {
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return;
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}
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for (final String imageUrl in _imageUrls) {
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final Future<JSAny?> fetchFuture = web.window.fetch(imageUrl.toJS).toDart;
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final web.Response image = (await fetchFuture)! as web.Response;
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final Future<JSAny?> imageFuture = image.arrayBuffer().toDart;
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final JSArrayBuffer imageBuffer = (await imageFuture)! as JSArrayBuffer;
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_imageData.add(imageBuffer.toDart.asUint8List());
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}
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}
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// The number of samples recorded so far.
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int _sampleCount = 0;
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// The number of samples used for warm-up.
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static const int _warmUpSampleCount = 5;
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// The number of samples used to measure performance after the warm-up.
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static const int _measuredSampleCount = 20;
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@override
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Future<void> body(Profile profile) async {
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await profile.recordAsync('recordImageDecode', () async {
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final List<Future<void>> allDecodes = <Future<void>>[
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for (final Uint8List data in _imageData) _decodeImage(data),
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];
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await Future.wait(allDecodes);
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}, reported: true);
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_sampleCount += 1;
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if (_sampleCount == _warmUpSampleCount) {
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profile.stopWarmingUp();
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}
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if (_sampleCount >= _warmUpSampleCount + _measuredSampleCount) {
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profile.stopBenchmark();
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}
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}
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}
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Future<void> _decodeImage(Uint8List data) async {
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final ui.Codec codec = await ui.instantiateImageCodec(data);
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const int decodeFrameCount = 5;
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if (codec.frameCount < decodeFrameCount) {
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throw Exception(
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'Test image contains too few frames for this benchmark (${codec.frameCount}). '
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'Choose a test image with at least $decodeFrameCount frames.',
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);
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}
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for (int i = 0; i < decodeFrameCount; i++) {
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(await codec.getNextFrame()).image.dispose();
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}
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codec.dispose();
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}
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