chromium/third_party/blink/perf_tests/parser/iframe-append-remove.html

<!DOCTYPE html>
<html>
<body>
<script src="../resources/runner.js"></script>
<script>

PerfTestRunner.measureRunsPerSecond({
    description: "This benchmark tests adding/removing an iframe from the DOM",
    run: function() {
        var iframe = document.createElement("iframe");
        document.body.appendChild(iframe);
        document.body.removeChild(iframe);
    }});
</script>
</body>
</html>