| // Copyright 2013 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:convert'; |
| import 'dart:io'; |
| |
| import 'common.dart'; |
| import 'constants.dart'; |
| |
| const String _kTimeUnitKey = 'time_unit'; |
| |
| const List<String> _kNonNumericalValueSubResults = <String>[ |
| kNameKey, |
| _kTimeUnitKey, |
| 'aggregate_name', |
| 'aggregate_unit', |
| 'error_message', |
| 'family_index', |
| 'per_family_instance_index', |
| 'label', |
| 'run_name', |
| 'run_type', |
| 'repetitions', |
| 'repetition_index', |
| 'threads', |
| 'iterations', |
| 'big_o', |
| ]; |
| |
| // Context has some keys such as 'host_name' which need to be ignored |
| // so that we can group series together |
| const List<String> _kContextIgnoreKeys = <String>[ |
| 'host_name', |
| 'load_avg', |
| 'caches', |
| ]; |
| |
| // ignore: avoid_classes_with_only_static_members |
| /// Parse the json result of https://github.com/google/benchmark. |
| class GoogleBenchmarkParser { |
| /// Given a Google benchmark json output, parse its content into a list of [MetricPoint]. |
| static Future<List<MetricPoint>> parse(String jsonFileName) async { |
| final Map<String, dynamic> jsonResult = |
| jsonDecode(File(jsonFileName).readAsStringSync()) |
| as Map<String, dynamic>; |
| |
| final Map<String, dynamic> rawContext = |
| jsonResult['context'] as Map<String, dynamic>; |
| final Map<String, String> context = rawContext.map<String, String>( |
| (String k, dynamic v) => MapEntry<String, String>(k, v.toString()), |
| )..removeWhere((String k, String v) => _kContextIgnoreKeys.contains(k)); |
| |
| final List<MetricPoint> points = <MetricPoint>[]; |
| for (final dynamic item in jsonResult['benchmarks']) { |
| _parseAnItem(item as Map<String, dynamic>, points, context); |
| } |
| return points; |
| } |
| } |
| |
| void _parseAnItem( |
| Map<String, dynamic> item, |
| List<MetricPoint> points, |
| Map<String, String> context, |
| ) { |
| final String name = item[kNameKey] as String; |
| final Map<String, String> timeUnitMap = <String, String>{ |
| kUnitKey: item[_kTimeUnitKey] as String |
| }; |
| for (final String subResult in item.keys) { |
| if (!_kNonNumericalValueSubResults.contains(subResult)) { |
| num? rawValue; |
| try { |
| rawValue = item[subResult] as num?; |
| } catch (e) { |
| print( |
| '$subResult: ${item[subResult]} (${item[subResult].runtimeType}) is not a number'); |
| rethrow; |
| } |
| |
| final double? value = |
| rawValue is int ? rawValue.toDouble() : rawValue as double?; |
| points.add( |
| MetricPoint( |
| value, |
| <String, String?>{kNameKey: name, kSubResultKey: subResult} |
| ..addAll(context) |
| ..addAll( |
| subResult.endsWith('time') ? timeUnitMap : <String, String>{}), |
| ), |
| ); |
| } |
| } |
| } |