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<!DOCTYPE html>
<html>
<head>
<script src="util.js"></script>
<script>
window.onload = function() {
document.head.appendChild(build_rule("body > .foo > .foo > .foo", 1000, "{ color: blue; } "));
let dom = build_dom(5000, "div", { attributes: {"class": "foo" } });
flush_style();
perf_start();
document.body.appendChild(dom);
flush_style(dom);
perf_finish();
};
</script>
</head>
<body>
</body>
</html>