declarative-shadow-dom.html | Explore in Territory

<!DOCTYPE html>

<body>
<pre id="log"></pre>
<div id=host></div>

<script src="../resources/runner.js"></script>
<script src="../shadow_dom/resources/declarative.js"></script>  
<script>
const shadowHtml = getShadowMarkup(true, /*depth=*/4, /*copies=*/100);
const host = document.getElementById('host');

PerfTestRunner.measureRunsPerSecond({
  description: "This benchmark tests declarative Shadow DOM attachment",
  run: function() {
    host.replaceChildren();
    parseAndAppend(host,shadowHtml);
  }
});
</script>

chromium/third_party/blink/perf_tests/parser/declarative-shadow-dom.html