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Side by Side Diff: PerformanceTests/Animation/resources/framerate.js

Issue 1176093003: Remove blink_perf.animation page set (Closed) Base URL: svn://svn.chromium.org/blink/trunk
Patch Set: Created 5 years, 6 months ago
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1 (function(){
2
3 var framesPerTimerReading = 10;
4 var frameCount = 0;
5 var startTime;
6 var trackingFrameRate = false;
7
8 function trackFrameRate(currTime)
9 {
10 if (++frameCount == framesPerTimerReading) {
11 frameCount = 0;
12 PerfTestRunner.measureValueAsync(1000 * framesPerTimerReading / (currTim e - startTime));
13 startTime = currTime;
14 }
15
16 if (trackingFrameRate)
17 requestAnimationFrame(trackFrameRate);
18 }
19
20 window.startTrackingFrameRate = function() {
21 if (trackingFrameRate)
22 return;
23 trackingFrameRate = true;
24 startTime = performance.now();
25 trackFrameRate();
26 };
27
28 window.stopTrackingFrameRate = function() {
29 trackingFrameRate = false;
30 };
31
32 })();
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