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Unified Diff: pkg/polymer/lib/elements/web-animations-js/test/perf/perf.js

Issue 175443005: [polymer] import all elements (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: updated from bower Created 6 years, 10 months ago
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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,
+};
+
+})();

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