зеркало из https://github.com/mozilla/gecko-dev.git
73 строки
2.5 KiB
HTML
73 строки
2.5 KiB
HTML
<!DOCTYPE HTML>
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<meta charset=utf-8>
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<title>PerformanceObservers: mark and measure</title>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="performanceobservers.js"></script>
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<h1>PerformanceObservers: mark and measure</h1>
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<p>
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Performance.mark() and Performance.measure() will <a href="https://w3c.github.io/performance-timeline/#dfn-queue-a-performanceentry">queue a PerformanceEntry</a>.
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</p>
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<div id="log"></div>
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<script>
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async_test(function (t) {
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var stored_entries = [];
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var observer = new PerformanceObserver(
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t.step_func(function (entryList, obs) {
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stored_entries =
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stored_entries.concat(entryList.getEntries());
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if (stored_entries.length >= 4) {
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checkEntries(stored_entries,
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[{ entryType: "mark", name: "mark1"},
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{ entryType: "mark", name: "mark2"},
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{ entryType: "measure", name: "measure1"},
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{ entryType: "measure", name: "measure2"}]);
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observer.disconnect();
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t.done();
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}
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})
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);
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observer.observe({entryTypes: ["mark", "measure"]});
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}, "entries are observable");
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async_test(function (t) {
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var mark_entries = [];
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var observer = new PerformanceObserver(
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t.step_func(function (entryList, obs) {
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mark_entries =
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mark_entries.concat(entryList.getEntries());
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if (mark_entries.length >= 2) {
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checkEntries(mark_entries,
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[{ entryType: "mark", name: "mark1"},
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{ entryType: "mark", name: "mark2"}]);
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observer.disconnect();
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t.done();
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}
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})
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);
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observer.observe({entryTypes: ["mark"]});
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performance.mark("mark1");
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performance.mark("mark2");
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}, "mark entries are observable");
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async_test(function (t) {
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var measure_entries = [];
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var observer = new PerformanceObserver(
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t.step_func(function (entryList, obs) {
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measure_entries =
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measure_entries.concat(entryList.getEntries());
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if (measure_entries.length >= 2) {
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checkEntries(measure_entries,
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[{ entryType: "measure", name: "measure1"},
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{ entryType: "measure", name: "measure2"}]);
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observer.disconnect();
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t.done();
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}
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})
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);
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observer.observe({entryTypes: ["measure"]});
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performance.measure("measure1");
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performance.measure("measure2");
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}, "measure entries are observable");
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</script>
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