<!DOCTYPE html>
<body>
<script src="../resources/runner.js"></script>
<script>
PerfTestRunner.measureTime({run: function() {
    (function() {
        for (var i = 0; i < 500000; i++)
            document.createElement("div").appendChild(document.createElement("span"));
    })();
    PerfTestRunner.gc();
}});
</script>
</body>