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ee781b71b4
Vendors the [blink perf tests](https://chromium.googlesource.com/chromium/src/+/HEAD/third_party/blink/perf_tests/). These perf tests are useful to evaluate the performance of servo. The license that governs the perf tests is included in the folder. Running benchmark cases automatically is left to future work. The update.py script is taken from mozjs and slightly adapted, so we can easily filter (and patch if this should be necessary in the future. Testing: This PR just adds the perf_tests, but does not use or modify them in any way. --------- Signed-off-by: Jonathan Schwender <schwenderjonathan@gmail.com>
42 lines
1 KiB
HTML
Vendored
42 lines
1 KiB
HTML
Vendored
<!DOCTYPE html>
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<script src="../resources/runner.js"></script>
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<script src="./resources/utils.js"></script>
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<style id=style>
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</style>
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<script>
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const DECLARATIONS = 200;
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const VALUE_LENGTH = 2000;
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function makeStyle() {
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let declarations = [];
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let value = [...Array(VALUE_LENGTH).keys()].map(() => 'X').join(' ');
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for (let i = 0; i < DECLARATIONS; i++) {
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declarations.push(`background: invalid-thing-${i}(${value});`);
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}
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return `
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div {
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${declarations.join('\n')}
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}
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`
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}
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let globalCounter = 0;
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const stylesheetText = makeStyle();
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let stylesheet = new CSSStyleSheet();
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PerfTestRunner.measureTime({
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description: 'Performance of parsing many invalid declarations',
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run: () => {
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// This is a parsing test: we don't care about style recalc.
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// We append a rule based on globalCounter to prevent caching
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// on the stylesheet string.
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stylesheet.replaceSync(stylesheetText + `\n .b${globalCounter++} {}`);
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style.textContent = stylesheetText;
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}
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});
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</script>
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