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Bug 1564150 - Make do_work_500ms.html non-blocking; r=canaltinova

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Differential Revision: https://phabricator.services.mozilla.com/D37282

--HG--
extra : moz-landing-system : lando
This commit is contained in:
Greg Tatum 2019-07-09 12:10:37 +00:00
parent 0236569496
commit 52c07a19be
1 changed files with 24 additions and 5 deletions
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29
tools/profiler/tests/browser/do_work_500ms.html
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@ -5,15 +5,34 @@
<title>Do some work for 500ms</title>
<script>
const milliseconds = 500;
const millisecondsPerBatch = 10;
const end = Date.now() + milliseconds;
window.total = 0;
let i = 0;
// Do some work for a set amount of time.
while (Date.now() < end) {
// Do some kind of work that is non-deterministic to guard against optimizations.
window.total += Math.random();
i++;
/**
* Do work for a set number of milliseconds, but only do the work in batches
* so the browser does not get unresponsive.
*/
function doWork() {
const batchEnd = Date.now() + millisecondsPerBatch;
// Do some work for a set amount of time.
while (Date.now() < end) {
// Do some kind of work that is non-deterministic to guard against optimizations.
window.total += Math.random();
i++;
// Check if a batch is done yet.
if (Date.now() > batchEnd) {
// Defer the rest of the work into a micro task. Keep on doing this until
// the total milliseconds have elapsed.
setTimeout(doWork, 0);
return;
}
}
}
doWork();
</script>
</head>
<body>