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6c4b38b707
The average frame time of page transitions on Moto G4 is now very close to 16ms (the last 10 measurements on our dashboard are between 15.5ms to 16.7ms and half of them are below 16ms). It is now much faster than when we disabled it (which was at about 35ms). So I think that we should be able to enable it by default. I'll leave the flag there until we implement the retained rendering to bring the frame time comfortably below 16ms. See https://github.com/flutter/flutter/issues/13736
86 lines
2.8 KiB
Dart
86 lines
2.8 KiB
Dart
// Copyright 2016 The Chromium 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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// See //dev/devicelab/bin/tasks/flutter_gallery__memory_nav.dart
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import 'dart:async';
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import 'package:flutter/material.dart';
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import 'package:flutter/scheduler.dart';
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import 'package:flutter_gallery/gallery/app.dart' show GalleryApp;
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import 'package:flutter_test/flutter_test.dart';
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Future<void> endOfAnimation() async {
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do {
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await SchedulerBinding.instance.endOfFrame;
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} while (SchedulerBinding.instance.hasScheduledFrame);
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}
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Rect boundsFor(WidgetController controller, Finder item) {
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final RenderBox box = controller.renderObject<RenderBox>(item);
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return box.localToGlobal(Offset.zero) & box.size;
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}
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Future<void> main() async {
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final Completer<void> ready = new Completer<void>();
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runApp(new GestureDetector(
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onTap: () {
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debugPrint('Received tap.');
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ready.complete();
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},
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behavior: HitTestBehavior.opaque,
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child: const IgnorePointer(
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ignoring: true,
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child: GalleryApp(testMode: true),
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),
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));
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await SchedulerBinding.instance.endOfFrame;
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await new Future<Null>.delayed(const Duration(milliseconds: 50));
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debugPrint('==== MEMORY BENCHMARK ==== READY ====');
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await ready.future;
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debugPrint('Continuing...');
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// remove onTap handler, enable pointer events for app
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runApp(new GestureDetector(
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child: const IgnorePointer(
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ignoring: false,
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child: GalleryApp(testMode: true),
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),
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));
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await SchedulerBinding.instance.endOfFrame;
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final WidgetController controller = new LiveWidgetController(WidgetsBinding.instance);
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debugPrint('Navigating...');
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await controller.tap(find.text('Material'));
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await new Future<Null>.delayed(const Duration(milliseconds: 150));
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final Finder demoList = find.byKey(const Key('GalleryDemoList'));
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final Finder demoItem = find.text('Text fields');
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do {
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await controller.drag(demoList, const Offset(0.0, -300.0));
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await new Future<Null>.delayed(const Duration(milliseconds: 20));
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} while (!demoItem.precache());
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// Ensure that the center of the "Text fields" item is visible
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// because that's where we're going to tap
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final Rect demoItemBounds = boundsFor(controller, demoItem);
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final Rect demoListBounds = boundsFor(controller, demoList);
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if (!demoListBounds.contains(demoItemBounds.center)) {
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await controller.drag(demoList, new Offset(0.0, demoListBounds.center.dy - demoItemBounds.center.dy));
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await endOfAnimation();
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}
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for (int iteration = 0; iteration < 15; iteration += 1) {
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debugPrint('Tapping... (iteration $iteration)');
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await controller.tap(demoItem);
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await endOfAnimation();
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debugPrint('Backing out...');
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await controller.tap(find.byTooltip('Back'));
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await endOfAnimation();
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}
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debugPrint('==== MEMORY BENCHMARK ==== DONE ====');
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}
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