<!DOCTYPE html>
<html>
<head>
<script src="util.js"></script>
<script>
window.onload = function() {
document.head.appendChild(build_rule("caption div", 10000, "{ color: blue; } "));
let dom = build_dom(5000, "div", { elemNameLeft: "div", elemNameRight: "div" });
flush_style();
perf_start();
document.body.appendChild(dom);
flush_style(dom);
perf_finish();
};
</script>
</head>
<body>
</body>
</html>