ID DOM lookup
JavaScript performance comparison
Preparation code
<div class='a'><div id='b'/></div><script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script>
Benchmark.prototype.setup = function() {
var $a = $('.a');
};
</script>
Preparation code output
Test runner
Warning! For accurate results, please disable Firebug before running the tests. (Why?)
Java applet disabled.
| Test | Ops/sec | |
|---|---|---|
Straight test lookup |
|
pending… |
Stored variable lookup |
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pending… |
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