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2f8474f9aa
* Roll engine to b6df7a637498ca9beda1fa9cd7210e3202ea599f. Changes since last roll: ``` b6df7a637 Roll dart to 290c576264faa096a0b3206c71b2435309d9f904. (#4771) a6764dbd5 Add sources for Fuchsia target. (#4763) 2d5900615 [fuchsia] Remove unused header file. (#4769) 9717063b7 Revert "Roll dart to c080951d45e79cd25df98036c4be835b284a269c. (#4767)" (#4768) 9a9814312 Roll dart to c080951d45e79cd25df98036c4be835b284a269c. (#4767) e74e8b35c [async] Update includes of async headers to new path (#4760) e2c4b2760 Use Dart 2 camel case constants in the engine Dart libraries (#4766) 9c1e48434 Updates for Fuchsia roll. (#4765) 14c940e27 Switch from fxl::Mutex to std::mutex (#4764) debf82c0b Roll Garnet (#4759) 5bffdefbb Use weak pointers to the accesibility bridge from objects vended to the UIKit accessibility framework. (#4761) ```
84 lines
2.7 KiB
Dart
84 lines
2.7 KiB
Dart
// Copyright 2017 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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import 'dart:convert' show json;
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import 'package:meta/meta.dart';
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/// This class knows how to format benchmark results for machine and human
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/// consumption.
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///
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/// Example:
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///
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/// BenchmarkResultPrinter printer = new BenchmarkResultPrinter();
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/// printer.add(
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/// description: 'Average frame time',
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/// value: averageFrameTime,
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/// unit: 'ms',
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/// name: 'average_frame_time',
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/// );
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/// printer.printToStdout();
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///
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class BenchmarkResultPrinter {
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final List<_BenchmarkResult> _results = <_BenchmarkResult>[];
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/// Adds a benchmark result to the list of results.
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///
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/// [description] is a human-readable description of the result. [value] is a
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/// result value. [unit] is the unit of measurement, such as "ms", "km", "h".
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/// [name] is a computer-readable name of the result used as a key in the JSON
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/// serialization of the results.
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void addResult({ @required String description, @required double value, @required String unit, @required String name }) {
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_results.add(new _BenchmarkResult(description, value, unit, name));
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}
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/// Prints the results added via [addResult] to standard output, once as JSON
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/// for computer consumption and once formatted as plain text for humans.
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void printToStdout() {
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// IMPORTANT: keep these values in sync with dev/devicelab/bin/tasks/microbenchmarks.dart
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const String jsonStart = '================ RESULTS ================';
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const String jsonEnd = '================ FORMATTED ==============';
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const String jsonPrefix = ':::JSON:::';
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print(jsonStart);
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print('$jsonPrefix ${_printJson()}');
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print(jsonEnd);
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print(_printPlainText());
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}
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String _printJson() {
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final Map<String, double> results = <String, double>{};
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for (_BenchmarkResult result in _results) {
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results[result.name] = result.value;
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}
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return json.encode(results);
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}
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String _printPlainText() {
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final StringBuffer buf = new StringBuffer();
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for (_BenchmarkResult result in _results) {
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buf.writeln('${result.description}: ${result.value.toStringAsFixed(1)} ${result.unit}');
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}
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return buf.toString();
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}
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}
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class _BenchmarkResult {
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_BenchmarkResult(this.description, this.value, this.unit, this.name);
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/// Human-readable description of the result, e.g. "Average frame time".
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final String description;
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/// Result value that in agreement with [unit].
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final double value;
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/// Unit of measurement that is in agreement with [value].
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final String unit;
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/// Computer-readable name of the result.
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final String name;
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}
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