SelectorSpeedJQUERY

JavaScript performance comparison

Revision 2 of this test case created

Preparation code

<div>
<span class="a"></span>
</div>
<div>
<span class="b"></span>
</div>
<div>
<span class="c"></span>
</div>
<div id="x">
<span class="y"></span>
</div>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script>
Benchmark.prototype.setup = function() {
    var $x = $('#x');
};
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
A
$('.y')
pending…
B
$x.find('.y')
pending…
C
$('#x').find('.y')
pending…
D
$('#x .y')
pending…
E
$('#x span.y')
pending…
F
$('div#x span.y')
pending…

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