chromium/third_party/blink/perf_tests/parser/url-parser.html

<!DOCTYPE html>
<body>
<script src="../resources/runner.js"></script>
<script>
var urls = PerfTestRunner.loadFile("resources/final-url-en").split("\n");
var anchor = document.createElement("a");

PerfTestRunner.measureRunsPerSecond({
    description: "Measures performance of URL parsing by setting the href attribute on an <a> tag to many different URLs.",
    run: function() {
        for (var x = 0; x < urls.length; x++) {
            anchor.href = urls[x];
        }
    }
});
</script>
</body>