19cb67abca
Automatic update from web-platform-tests [LongTasks] Truncate duration to 1 ms resolution Bug: 1146022 Change-Id: I71c726fdb85d432271220c66557a0fc64bdd341d Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2552846 Commit-Queue: Nicolás Peña Moreno <npm@chromium.org> Reviewed-by: Yoav Weiss <yoavweiss@chromium.org> Cr-Commit-Position: refs/heads/master@{#832970} -- wpt-commits: d1aaf685cfb02e0350701550afe4146d555f2461 wpt-pr: 26614
27 lines
1.2 KiB
JavaScript
27 lines
1.2 KiB
JavaScript
// META: script=resources/utils.js
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async_test(t => {
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assert_implements(window.PerformanceLongTaskTiming, 'Longtasks are not supported.');
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new PerformanceObserver(t.step_func((entryList, obs) => {
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const observer = new PerformanceObserver(t.step_func_done(list => {
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let longtaskObserved = false;
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list.getEntries().forEach(entry => {
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if (entry.entryType === 'mark')
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return;
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checkLongTaskEntry(entry);
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longtaskObserved = true;
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});
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assert_true(longtaskObserved, 'Did not observe buffered longtask.');
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}));
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observer.observe({type: 'longtask', buffered: true});
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// Observer mark so that we can flush the observer callback.
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observer.observe({type: 'mark'});
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performance.mark('m');
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// Disconnect the embedding observer so this callback only runs once.
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obs.disconnect();
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})).observe({entryTypes: ['longtask']});
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// Create a long task.
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const begin = window.performance.now();
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while (window.performance.now() < begin + 60);
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}, 'PerformanceObserver with buffered flag can see previous longtask entries.');
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