67 lines
1.8 KiB
HTML
67 lines
1.8 KiB
HTML
<!DOCTYPE html>
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<body>
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<pre id="log"></pre>
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<script src="../resources/runner.js"></script>
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<div id="sandbox" style="display:none"></div>
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<script>
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var sandbox = document.getElementById('sandbox');
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var node = sandbox;
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for (var i = 0; i < 200; ++i)
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node = node.appendChild(document.createElement('div'));
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var observing = false;
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var observer = new WebKitMutationObserver(listener);
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var tickledSpan = document.createElement('span');
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observer.observe(tickledSpan, {attributes: true});
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function resetState() {
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window.start = null;
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window.numRuns = 25;
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window.times = [];
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}
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function runAgain() {
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tickledSpan.setAttribute('data-foo', numRuns);
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}
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function hideFromObservation(func) {
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if (observing)
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observer.disconnect();
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func();
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if (observing)
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observer.observe(sandbox, {childList: true, subtree: true});
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}
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function listener(mutations) {
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if (start) {
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var time = Date.now() - start;
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times.push(time);
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PerfTestRunner.log(time);
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}
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if (numRuns-- >= 0) {
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runAgain();
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hideFromObservation(function() {
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for (var i = 0; i < 50000; ++i)
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node.appendChild(document.createElement('div'));
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});
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start = Date.now();
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while (node.firstChild)
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node.removeChild(node.firstChild);
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} else {
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PerfTestRunner.logStatistics(times);
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if (!observing) {
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observing = true;
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resetState();
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PerfTestRunner.log('\n------------\n');
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PerfTestRunner.log('Running ' + numRuns + ' times with observation');
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setTimeout(runAgain, 0);
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}
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}
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}
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resetState();
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PerfTestRunner.log('Running ' + numRuns + ' times without observation');
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window.addEventListener('load', runAgain);
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</script>
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</body>
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