Codebase Browser
chromium
Go to App

chromium/third_party/blink/perf_tests/dom/dom-parts-api-flat-append.html 

<!DOCTYPE html>
<script src="../resources/runner.js"></script>
<script src="resources/dom-parts-api.js"></script>

<body>
<script>
  runPerfTest('Parts, flat','appendTime');
</script>