Index: pkg/polymer/lib/elements/web-animations-js/test/perf/perf.js |
diff --git a/pkg/polymer/lib/elements/web-animations-js/test/perf/perf.js b/pkg/polymer/lib/elements/web-animations-js/test/perf/perf.js |
new file mode 100644 |
index 0000000000000000000000000000000000000000..8b5bb0d8810ae8a4329dfc0578202e60a641a361 |
--- /dev/null |
+++ b/pkg/polymer/lib/elements/web-animations-js/test/perf/perf.js |
@@ -0,0 +1,158 @@ |
+/** |
+ * Copyright 2013 Google Inc. All Rights Reserved. |
+ * |
+ * Licensed under the Apache License, Version 2.0 (the "License"); |
+ * you may not use this file except in compliance with the License. |
+ * You may obtain a copy of the License at |
+ * |
+ * http://www.apache.org/licenses/LICENSE-2.0 |
+ * |
+ * Unless required by applicable law or agreed to in writing, software |
+ * distributed under the License is distributed on an "AS IS" BASIS, |
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
+ * See the License for the specific language governing permissions and |
+ * limitations under the License. |
+ */ |
+ |
+(function(){ |
+'use strict'; |
+ |
+var disregardFramesCount = 10; |
+var framesPerTimeReading = 10; |
+var maxTimeReadings = 60; |
+var maxFPSReadings = 31; |
+ |
+var frameCount = 0; |
+var timeReadings = []; |
+var fpsReadings = []; |
+var onCompleteHandler; |
+var outputElement; |
+var running = false; |
+var visibilityLost = false; |
+ |
+var getTime = (typeof window.performance === 'object' && |
+ typeof window.performance.now === 'function') ? |
+ function() { return window.performance.now(); } : |
+ function() { return Date.now(); }; |
+ |
+var raf = window.requestAnimationFrame || |
+ window.webkitRequestAnimationFrame || |
+ window.mozRequestAnimationFrame || |
+ function(callback) { setTimeout(callback, 1000 / 60); }; |
+ |
+var visibilityChangeEvent = null; |
+var hidden = null; |
+if (typeof document.hidden !== 'undefined') { |
+ visibilityChangeEvent = 'visibilitychange'; |
+ hidden = 'hidden'; |
+} else if (typeof document.mozHidden !== 'undefined') { |
+ visibilityChangeEvent = 'mozvisibilitychange'; |
+ hidden = 'mozHidden'; |
+} else if (typeof document.msHidden !== 'undefined') { |
+ visibilityChangeEvent = 'msvisibilitychange'; |
+ hidden = 'msHidden'; |
+} else if (typeof document.webkitHidden !== 'undefined') { |
+ visibilityChangeEvent = 'webkitvisibilitychange'; |
+ hidden = 'webkitHidden'; |
+} |
+if (visibilityChangeEvent) { |
+ document.addEventListener(visibilityChangeEvent, function() { |
+ if (running && document[hidden]) { |
+ visibilityLost = true; |
+ } |
+ }); |
+} |
+ |
+var randomSeed = 3384413; |
+function random() { |
+ var temp = randomSeed; |
+ // Robert Jenkins' 32 bit integer hash function. |
+ temp = ((temp + 0x7ed55d16) + (temp << 12)) & 0xffffffff; |
+ temp = ((temp ^ 0xc761c23c) ^ (temp >>> 19)) & 0xffffffff; |
+ temp = ((temp + 0x165667b1) + (temp << 5)) & 0xffffffff; |
+ temp = ((temp + 0xd3a2646c) ^ (temp << 9)) & 0xffffffff; |
+ temp = ((temp + 0xfd7046c5) + (temp << 3)) & 0xffffffff; |
+ temp = ((temp ^ 0xb55a4f09) ^ (temp >>> 16)) & 0xffffffff; |
+ randomSeed = temp; |
+ return (randomSeed & 0xfffffff) / 0x10000000; |
+} |
+ |
+function disregardFrames() { |
+ raf((frameCount++ < disregardFramesCount) ? disregardFrames : trackFrameRate); |
+} |
+ |
+function trackFrameRate() |
+{ |
+ frameCount++; |
+ if (frameCount % framesPerTimeReading === 0) { |
+ timeReadings.unshift(getTime()); |
+ if (timeReadings.length > maxTimeReadings) { |
+ timeReadings.pop(); |
+ } |
+ if (timeReadings.length > 1) { |
+ var fpsReading = 1000 * (timeReadings.length - 1) * framesPerTimeReading / |
+ (timeReadings[0] - timeReadings[timeReadings.length - 1]); |
+ fpsReadings.push(fpsReading); |
+ output(fpsReading + ' FPS\n'); |
+ if (fpsReadings.length >= maxFPSReadings) { |
+ outputSummary(); |
+ running = false; |
+ if (typeof onCompleteHandler === 'function') { |
+ onCompleteHandler(); |
+ } |
+ return; |
+ } |
+ } |
+ } |
+ raf(trackFrameRate); |
+} |
+ |
+function output(text) { |
+ outputElement.value += text; |
+} |
+ |
+function outputSummary() { |
+ if (visibilityLost) { |
+ output('Warning: Document lost visibility during test, ' + |
+ 'results may be inaccurate.\n'); |
+ } |
+ var total = 0; |
+ fpsReadings.forEach(function(fpsReading) { total += fpsReading; }); |
+ var average = total / maxFPSReadings; |
+ output('Average: ' + average + ' FPS\n'); |
+ var temp = 0; |
+ fpsReadings.forEach(function(fpsReading) { |
+ temp += (fpsReading - average) * (fpsReading - average); |
+ }); |
+ output('Stddev: ' + Math.sqrt(temp / fpsReadings.length) + ' FPS\n'); |
+ fpsReadings.sort(); |
+ output('Min: ' + fpsReadings[0] + ' FPS\n'); |
+ output('Max: ' + fpsReadings[fpsReadings.length - 1] + ' FPS\n'); |
+ var median = fpsReadings[fpsReadings.length >> 1]; |
+ if (fpsReadings.length % 2 !== 0) { |
+ median = (median + fpsReadings[(fpsReadings.length >> 1) + 1]) / 2; |
+ } |
+ output('Median: ' + median + ' FPS\n'); |
+} |
+ |
+var start = function() { |
+ outputElement = document.createElement('textarea'); |
+ outputElement.setAttribute('rows', maxFPSReadings + 6); |
+ outputElement.setAttribute('cols', 32); |
+ document.body.appendChild(outputElement); |
+ |
+ output('Disregarding initial ' + disregardFramesCount + ' frames.\n') |
+ raf(disregardFrames); |
+ |
+ running = true; |
+}; |
+ |
+window.Perf = { |
+ set oncomplete(callback) { |
+ onCompleteHandler = callback; |
+ }, |
+ start: start, |
+ random: random, |
+}; |
+ |
+})(); |