// 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:ui'; import 'package:flutter_test/flutter_test.dart'; void main() { group(FrameTimingSummarizer, () { test('calculates all fields', () { List<int> vsyncTimes = <int>[ for (int i = 0; i < 100; i += 1) 100 * (i + 1), ]; List<int> buildTimes = <int>[ for (int i = 0; i < 100; i += 1) vsyncTimes[i] + 1000 * (i + 1), ]; List<int> rasterTimes = <int>[ for (int i = 0; i < 100; i += 1) 1000 * (i + 1) + 1000, ]; // reversed to make sure sort is working. buildTimes = buildTimes.reversed.toList(); rasterTimes = rasterTimes.reversed.toList(); vsyncTimes = vsyncTimes.reversed.toList(); final List<FrameTiming> inputData = <FrameTiming>[ for (int i = 0; i < 100; i += 1) FrameTiming( vsyncStart: 0, buildStart: vsyncTimes[i], buildFinish: buildTimes[i], rasterStart: 500, rasterFinish: rasterTimes[i], // Wall time should not be used in any profiling metrics. // It is primarily to correlate with external tools' measurement. rasterFinishWallTime: 0, ), ]; final FrameTimingSummarizer summary = FrameTimingSummarizer(inputData); expect(summary.averageFrameBuildTime.inMicroseconds, 50500); expect(summary.p90FrameBuildTime.inMicroseconds, 90000); expect(summary.p99FrameBuildTime.inMicroseconds, 99000); expect(summary.worstFrameBuildTime.inMicroseconds, 100000); expect(summary.missedFrameBuildBudget, 84); expect(summary.averageFrameRasterizerTime.inMicroseconds, 51000); expect(summary.p90FrameRasterizerTime.inMicroseconds, 90500); expect(summary.p99FrameRasterizerTime.inMicroseconds, 99500); expect(summary.worstFrameRasterizerTime.inMicroseconds, 100500); expect(summary.missedFrameRasterizerBudget, 85); expect(summary.frameBuildTime.length, 100); expect(summary.averageVsyncOverhead.inMicroseconds, 5050); expect(summary.p90VsyncOverhead.inMicroseconds, 9000); expect(summary.p99VsyncOverhead.inMicroseconds, 9900); expect(summary.worstVsyncOverhead.inMicroseconds, 10000); }); group('missed budget count', () { test('when single element missed budget', () { final FrameTimingSummarizer summary = FrameTimingSummarizer(<FrameTiming>[ FrameTiming( buildStart: 0, buildFinish: (kBuildBudget + const Duration(microseconds: 1)).inMicroseconds, vsyncStart: 0, rasterStart: 0, rasterFinish: 0, rasterFinishWallTime: 0, ), ]); expect(summary.missedFrameBuildBudget, 1); }); test('when single element within budget', () { final FrameTimingSummarizer summary = FrameTimingSummarizer(<FrameTiming>[ FrameTiming( buildStart: 0, buildFinish: 0, vsyncStart: 0, rasterStart: 0, rasterFinish: 0, rasterFinishWallTime: 0, ), ]); expect(summary.missedFrameBuildBudget, 0); }); test('when single element exactly within budget', () { final FrameTimingSummarizer summary = FrameTimingSummarizer(<FrameTiming>[ FrameTiming( buildStart: 0, buildFinish: kBuildBudget.inMicroseconds, vsyncStart: 0, rasterStart: 0, rasterFinish: 0, rasterFinishWallTime: 0, ), ]); expect(summary.missedFrameBuildBudget, 0); }); test('when many missed budget', () { final FrameTimingSummarizer summary = FrameTimingSummarizer(<FrameTiming>[ FrameTiming( buildStart: 0, buildFinish: 0, vsyncStart: 0, rasterStart: 0, rasterFinish: 0, rasterFinishWallTime: 0, ), FrameTiming( buildStart: 0, buildFinish: kBuildBudget.inMicroseconds, vsyncStart: 0, rasterStart: 0, rasterFinish: 0, rasterFinishWallTime: 0, ), FrameTiming( buildStart: 0, buildFinish: (kBuildBudget + const Duration(microseconds: 1)).inMicroseconds, vsyncStart: 0, rasterStart: 0, rasterFinish: 0, rasterFinishWallTime: 0, ), FrameTiming( buildStart: 0, buildFinish: (kBuildBudget + const Duration(microseconds: 2)).inMicroseconds, vsyncStart: 0, rasterStart: 0, rasterFinish: 0, rasterFinishWallTime: 0, ), ]); expect(summary.missedFrameBuildBudget, 2); }); }); }); }