chromium/third_party/blink/perf_tests/bindings/worker-structured-clone-workerDOM-Map-from-worker.html

<!DOCTYPE html>
<body>
<script src="../resources/runner.js"></script>
<script src="resources/worker-structured-clone-perf-test.js"></script>
<script>
WorkerStructuredClonePerfTestRunner.measureTimeAsync({
  description: "Measures performance of sending JSON data representing a Worker DOM Map from a worker back to the main thread using deserialization.",
  data: JSON.parse(PerfTestRunner.loadFile("resources/data/WorkerDOM-Map.json")),
  measure: "fromWorker",
});
</script>
</body>