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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>
52 lines
1.3 KiB
HTML
Vendored
52 lines
1.3 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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<main id=main></main>
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<style>
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/* Explicit inheritance is used to trigger recalc of all elements. */
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* { z-index: inherit; }
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:root { z-index: 42; }
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</style>
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<script>
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g_counter = 0;
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// Create a tree where *each* leaf node has a stylesheet
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// with an implict @scope rule (with a matching style rule inside).
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function createTree(siblings, depth) {
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let root = document.createElement('div');
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if (depth >= 2) {
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root.append(...[...Array(siblings).keys()].map(() => createTree(siblings, depth - 1)));
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} else {
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// Leaf nodes.
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root.classList.add('leaf');
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let style = document.createElement('style');
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style.textContent = `
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/* Prevent cache: ${g_counter++} */
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@scope {
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.leaf:scope { background-color: green; }
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}
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`;
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root.append(style);
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}
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return root;
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}
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function setup() {
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let root = createTree(/* siblings */ 5, /* depth */ 5);
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main.append(root);
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}
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setup();
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PerfTestRunner.measureTime({
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description: 'Many implicit whole-RuleSet @scopes with matching rules',
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run: () => {
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main.offsetTop;
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main.style.zIndex = '43';
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main.offsetTop;
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main.style.zIndex = '42';
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}
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});
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</script>
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