| <!DOCTYPE html> |
| <!-- |
| Copyright (c) 2015 The Chromium Authors. All rights reserved. |
| Use of this source code is governed by a BSD-style license that can be |
| found in the LICENSE file. |
| --> |
| |
| <link rel="import" href="/tracing/base/statistics.html"> |
| <link rel="import" href="/tracing/metrics/system_health/utils.html"> |
| <link rel="import" href="/tracing/model/user_model/animation_expectation.html"> |
| |
| <script> |
| 'use strict'; |
| |
| tr.exportTo('tr.metrics.sh', function() { |
| // The Animation Throughput score is maximized at this value of average |
| // frames-per-second. |
| var MAX_FPS = 60; |
| |
| // The Animation Throughput score is minimized at this value of average |
| // frames-per-second. |
| var MIN_FPS = 10; |
| |
| var UNIT = tr.v.Unit.byName.normalizedPercentage_biggerIsBetter; |
| |
| var DESCRIPTION = 'Mean Opinion Score for Animation throughput'; |
| |
| function AnimationThroughputMetric(valueList, model) { |
| model.userModel.expectations.forEach(function(ue) { |
| if (!(ue instanceof tr.model.um.AnimationExpectation)) |
| return; |
| |
| if (ue.frameEvents === undefined || |
| ue.frameEvents.length === 0) |
| throw new Error('Animation missing frameEvents ' + ue.stableId); |
| |
| var options = {}; |
| options.description = DESCRIPTION; |
| |
| var groupingKeys = {}; |
| groupingKeys.userExpectationStableId = ue.stableId; |
| groupingKeys.userExpectationStageTitle = ue.stageTitle; |
| groupingKeys.userExpectationInitiatorTitle = ue.initiatorTitle; |
| |
| var durationSeconds = ue.duration / 1000; |
| var avgSpf = durationSeconds / ue.frameEvents.length; |
| var throughput = 1 - tr.b.normalize(avgSpf, 1 / MAX_FPS, 1 / MIN_FPS); |
| var score = tr.b.clamp(throughput, 0, 1); |
| |
| valueList.addValue(new tr.v.NumericValue( |
| model.canonicalUrlThatCreatedThisTrace, 'throughput', |
| new tr.v.ScalarNumeric(UNIT, score), |
| options, groupingKeys)); |
| }); |
| } |
| |
| AnimationThroughputMetric.prototype = { |
| __proto__: Function.prototype |
| }; |
| |
| tr.metrics.MetricRegistry.register(AnimationThroughputMetric); |
| |
| return { |
| AnimationThroughputMetric: AnimationThroughputMetric |
| }; |
| }); |
| </script> |
| |
