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<!DOCTYPE html>
<html>
<head>
<script src="util.js"></script>
<script>
window.onload = function() {
document.head.appendChild(build_rule("caption#foo", 1, "{ color: blue; } "));
let dom = build_dom(2048, "div");
let p = dom;
for (var i = 0; i < 5; ++i ) {
p = p.firstChild.lastChild;
}
let elem = document.createElement("caption");
p.appendChild(elem);
document.body.appendChild(dom);
flush_style();
perf_start();
var state = true;
for (i = 0; i < 100000; ++i) {
elem.setAttribute("id", state ? "" : "foo");
state = !state;
window.getComputedStyle(elem).color;
}
perf_finish();
};
</script>
</head>
<body>
</body>
</html>