| OLD | NEW |
|---|
| (Empty) | |
| 1 <!DOCTYPE html> |
| 2 <meta name="viewport" content="width=device-width, user-scalable=no"> |
| 3 <link rel="stylesheet" type="text/css" href="resources/tablet.css"> |
| 4 <link rel="stylesheet" type="text/css" href="resources/transition.css"> |
| 5 <script src="resources/perftesthelper.js"></script> |
| 6 <style> |
| 7 show + target { |
| 8 opacity: 1; |
| 9 } |
| 10 hide + target { |
| 11 opacity: 0; |
| 12 } |
| 13 show, hide { |
| 14 display: none; |
| 15 } |
| 16 </style> |
| 17 |
| 18 <container id="container"></container> |
| 19 |
| 20 <script> |
| 21 var N = PerfTestHelper.getN(1000); |
| 22 var duration = 1000; |
| 23 var stash = {SHOW: [], HIDE: []}; |
| 24 var targets = []; |
| 25 |
| 26 for (var i = 0; i < N; i++) { |
| 27 stash.HIDE.push(document.createElement('hide')); |
| 28 var show = document.createElement('show'); |
| 29 container.appendChild(show); |
| 30 var target = document.createElement('target'); |
| 31 container.appendChild(target); |
| 32 targets.push(target); |
| 33 } |
| 34 |
| 35 function startTransition(target, fastForward) { |
| 36 var state = target.previousSibling; |
| 37 stash[state.tagName].push(state); |
| 38 state.remove(); |
| 39 var newState = state.tagName == 'SHOW' ? stash.HIDE.pop() : stash.SHOW.pop(); |
| 40 container.insertBefore(newState, target); |
| 41 target.style.transitionDelay = -fastForward + 'ms'; |
| 42 } |
| 43 |
| 44 requestAnimationFrame(function(time) { |
| 45 var startTime = time - duration; |
| 46 var step = 0; |
| 47 |
| 48 function staggeredStart(time) { |
| 49 var elapsed = time - startTime; |
| 50 var targetStep = Math.floor(N * elapsed / duration); |
| 51 step = Math.max(targetStep - N, step); |
| 52 for (; step < targetStep; step++) { |
| 53 startTransition(targets[step % N], elapsed - (step / N * duration)); |
| 54 } |
| 55 requestAnimationFrame(staggeredStart); |
| 56 } |
| 57 staggeredStart(time); |
| 58 }); |
| 59 |
| 60 PerfTestHelper.signalReady(); |
| 61 </script> |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 399393002:
Add CSS Transitions performance tests (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src