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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>
74 lines
No EOL
2.4 KiB
HTML
Vendored
74 lines
No EOL
2.4 KiB
HTML
Vendored
<!DOCTYPE html>
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<html>
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<head>
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<script src="../resources/runner.js"></script>
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<script src="resources/utils.js"></script>
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</head>
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<body>
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<header id=info>CSS Variables: <button id=button></button></header>
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</body>
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<script>
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const propCount = 1000;
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// Add ?ref to URL to run a similar test without CSS Variables.
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const ref = document.location.href.endsWith('?ref');
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button.textContent = ref ? 'OFF' : 'ON';
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button.addEventListener('click', function(){
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let href = document.location.href;
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if (ref) {
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document.location.href = href.substr(0, href.length - 4);
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} else {
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document.location.href = href + '?ref';
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}
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});
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function hexcolor(i) {
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let hex = i.toString(16);
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while (hex.length < 6)
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hex = '0' + hex;
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return '#' + hex;
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}
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// Create a rule which defines 'propCount' custom properties at :root.
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function createRootRule() {
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let lines = [':root {'];
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for (let i = 0; i < propCount; i++) {
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lines.push(`--prop-${i}: ${hexcolor(i)};`);
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}
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lines.push('}');
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return lines.join('\n');
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}
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// Create 'propCount' rules, each refering to a custom property created
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// by createRootRule.
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//
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// If 'ref' is true, then the colors that would have been resolved via
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// the var()-references are inlined instead.
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function createDivRules() {
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let lines = [];
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for (let i = 0; i < propCount; i++) {
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if (ref) {
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lines.push(`div { background-color: ${hexcolor(i)}; }`);
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} else {
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lines.push(`div { background-color: var(--prop-${i}); }`);
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}
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}
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return lines.join('\n');
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}
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applyCSSRule(createRootRule());
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applyCSSRule(createDivRules());
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createRegularDOMTree();
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PerfTestRunner.measureTime({
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description: 'Measures the performance of applying many var()-references.',
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run: function() {
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document.body.style = 'display: none';
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forceStyleRecalc(document.body);
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document.body.style = 'display: block';
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forceStyleRecalc(document.body);
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}
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});
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</script>
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</html> |