// 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 'dart:async'; import 'package:flutter_test/flutter_test.dart'; import 'package:flutter/material.dart'; import 'package:flutter/rendering.dart'; import 'package:flutter/scheduler.dart'; import 'package:stocks/main.dart' as stocks; import 'package:stocks/stock_data.dart' as stock_data; import '../common.dart'; const Duration kBenchmarkTime = Duration(seconds: 15); class BenchmarkingBinding extends LiveTestWidgetsFlutterBinding { BenchmarkingBinding(this.stopwatch); final Stopwatch stopwatch; @override void handleBeginFrame(Duration rawTimeStamp) { stopwatch.start(); super.handleBeginFrame(rawTimeStamp); } @override void handleDrawFrame() { super.handleDrawFrame(); stopwatch.stop(); } } Future<void> main() async { assert(false, "Don't run benchmarks in checked mode! Use 'flutter run --release'."); stock_data.StockData.actuallyFetchData = false; final Stopwatch wallClockWatch = Stopwatch(); final Stopwatch cpuWatch = Stopwatch(); BenchmarkingBinding(cpuWatch); int totalOpenFrameElapsedMicroseconds = 0; int totalOpenIterationCount = 0; int totalCloseFrameElapsedMicroseconds = 0; int totalCloseIterationCount = 0; int totalSubsequentFramesElapsedMicroseconds = 0; int totalSubsequentFramesIterationCount = 0; await benchmarkWidgets((WidgetTester tester) async { stocks.main(); await tester.pump(); // Start startup animation await tester.pump(const Duration(seconds: 1)); // Complete startup animation bool drawerIsOpen = false; wallClockWatch.start(); while (wallClockWatch.elapsed < kBenchmarkTime) { cpuWatch.reset(); if (drawerIsOpen) { await tester.tapAt(const Offset(780.0, 250.0)); // Close drawer await tester.pump(); totalCloseIterationCount += 1; totalCloseFrameElapsedMicroseconds += cpuWatch.elapsedMicroseconds; } else { await tester.tapAt(const Offset(20.0, 50.0)); // Open drawer await tester.pump(); totalOpenIterationCount += 1; totalOpenFrameElapsedMicroseconds += cpuWatch.elapsedMicroseconds; } drawerIsOpen = !drawerIsOpen; // Time how long each frame takes cpuWatch.reset(); while (SchedulerBinding.instance.hasScheduledFrame) { await tester.pump(); totalSubsequentFramesIterationCount += 1; } totalSubsequentFramesElapsedMicroseconds += cpuWatch.elapsedMicroseconds; } }); final BenchmarkResultPrinter printer = BenchmarkResultPrinter(); printer.addResult( description: 'Stock animation', value: wallClockWatch.elapsedMicroseconds / (1000 * 1000), unit: 's', name: 'stock_animation_total_run_time', ); printer.addResult( description: ' Opening first frame average time', value: totalOpenFrameElapsedMicroseconds / totalOpenIterationCount, unit: 'µs per frame ($totalOpenIterationCount frames)', name: 'stock_animation_open_first_frame_average', ); printer.addResult( description: ' Closing first frame average time', value: totalCloseFrameElapsedMicroseconds / totalCloseIterationCount, unit: 'µs per frame ($totalCloseIterationCount frames)', name: 'stock_animation_close_first_frame_average', ); printer.addResult( description: ' Subsequent frames average time', value: totalSubsequentFramesElapsedMicroseconds / totalSubsequentFramesIterationCount, unit: 'µs per frame ($totalSubsequentFramesIterationCount frames)', name: 'stock_animation_subsequent_frame_average', ); printer.printToStdout(); }