<script src="../resources/js-test-pre.js"></script>
<body>
<script>
function timeRenderTreeCreation(count) {
    var t = Date.now();
    for (var i = 0; i < count; ++i)
        document.body.appendChild(document.createElement('div'));
    document.body.offsetTop;
    return Date.now() - t;
}
shouldBe("timeRenderTreeCreation(5000) < 20 * timeRenderTreeCreation(500)", "true");
</script>
<script src="../resources/js-test-post.js"></script>