flutter/dev/benchmarks/macrobenchmarks/lib/main.dart
liyuqian a44f174efc
Shader warm up (#27660)
This patch adds a default shader warm up process which moves shader compilation from the animation time to the startup time. This also provides an extension for `runApp` so developers can customize the warm up process.

This should reduce our worst_frame_rasterizer_time_millis from ~100ms to ~20-30ms for both flutter_gallery and complex_layout benchmarks. Besides, this should also have a significant improvement on 90th and 99th percentile time (50%-100% speedup in some cases, but I haven't tested them thoroughly; I'll let our device lab collect the data afterwards).

The tradeoff the is the startup time (time to first frame). Our `flutter run --profile --trace-startup` seems to be a little noisy and I see about 100ms-200ms increase in that measurement for complex_layout and flutter_gallery. Note that this only happens on the first run after install or data wipe. Later the Skia persistent cache will remove the overhead.

This also adds a cubic_bezier benchmark to test the custom shader warm up process.

This should fix https://github.com/flutter/flutter/issues/813 (either by `defaultShaderWarmUp`, or a `customShaderWarmUp`).
2019-02-22 15:37:02 -08:00

56 lines
1.5 KiB
Dart

// Copyright 2015 The Chromium 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/material.dart';
import 'common.dart';
import 'src/cubic_bezier.dart';
import 'src/cull_opacity.dart';
const String kMacrobenchmarks ='Macrobenchmarks';
void main() => runApp(MacrobenchmarksApp());
class MacrobenchmarksApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: kMacrobenchmarks,
initialRoute: '/',
routes: <String, WidgetBuilder>{
'/': (BuildContext context) => HomePage(),
kCullOpacityRouteName: (BuildContext context) => CullOpacityPage(),
kCubicBezierRouteName: (BuildContext context) => CubicBezierPage(),
},
);
}
}
class HomePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: const Text(kMacrobenchmarks)),
body: ListView(
children: <Widget>[
RaisedButton(
key: const Key(kCullOpacityRouteName),
child: const Text('Cull opacity'),
onPressed: (){
Navigator.pushNamed(context, kCullOpacityRouteName);
},
),
RaisedButton(
key: const Key(kCubicBezierRouteName),
child: const Text('Cubic Bezier'),
onPressed: (){
Navigator.pushNamed(context, kCubicBezierRouteName);
},
)
],
),
);
}
}