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https://github.com/LadybirdBrowser/ladybird
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7577fd2a57
This clamps the interval of repeating timers to 4ms after they have run 5 times. This prevents CPU spinning for `setInterval()` calls with low timeouts.
24 lines
752 B
HTML
24 lines
752 B
HTML
<!DOCTYPE html>
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<script src="../include.js"></script>
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<script>
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asyncTest(done => {
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// With 4ms clamping after nesting level 5, running for 100ms should yield
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// roughly 5-6 unclamped calls plus approximately 25 clamped calls.
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// Without clamping, we'd get thousands of calls.
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// We test that the count is bounded, proving clamping is working.
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const testDurationMilliseconds = 100;
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let callCount = 0;
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const id = setInterval(() => {
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callCount++;
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}, 0);
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setTimeout(() => {
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clearInterval(id);
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println(`Callback count bounded (< 100 in 100ms): ${callCount < 100}`);
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done();
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}, testDurationMilliseconds);
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});
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</script>
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