jQuery Selector Benchmark

JavaScript performance comparison

Revision 35 of this test case created

Info

You can select children on a DOM in so many ways. This test breaks down selecting children in a list with use of a context, no context, and child selectors.

Preparation code

<script src="//code.jquery.com/jquery-1.11.1.min.js">
</script>
<div id="container">
  <ul id="parent">
    <li class="child">
    </li>
    <li class="foo">
    </li>
    <li class="child">
    </li>
    <li class="bar">
    </li>
  </ul>
</div>
<script>
  Benchmark.prototype.setup = function() {
    //Save The Context
    var parentContext = document.getElementById('parent');
  };
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
Context
$('.child', parentContext);
pending…
Find
$(parentContext).find('.child');
pending…
Alternate Find
$('#parent').find('.child');
pending…
Children
$(parentContext).children('.child');
pending…
Parent / Child Selector
$('#parent > .child');
pending…
Class Only
$('.child');
pending…
Tag
$('li');
pending…
Tag + attribute
$('li[class=child]');
pending…
Tag + attribute 2
$('*[class=child]');
pending…

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