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tests: Vendor blink perf tests (#38654)

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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>
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Jonathan Schwender 2025-08-17 11:54:04 +02:00 • committed by GitHub
parent 7621332824
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tests/blink_perf_tests/perf_tests/parser/html-parser.html Normal file
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<!DOCTYPE html>
<body>
<script src="../resources/runner.js"></script>
<script>
var spec = PerfTestRunner.loadFile("resources/html5.html");
PerfTestRunner.measureTime({
description: "Measures performance of the HTML parser.",
run: function() {
var iframe = document.createElement("iframe");
iframe.style.display = "none"; // Prevent creation of the rendering tree, so we only test HTML parsing.
iframe.sandbox = 'allow-same-origin'; // Prevent external script loads which could cause write() to return before completing the parse.
document.body.appendChild(iframe);
iframe.contentDocument.open();
iframe.contentDocument.write(spec);
iframe.contentDocument.close();
document.body.removeChild(iframe);
}
});
</script>
</body>