class-vs-id

JavaScript performance comparison

Revision 2 of this test case created

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<ul>
<li></li>
<li></li>
<li></li>
<li></li>
</ul>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
first
$('li:first-child')
pending…
second
$('li:nth-child(1)')
pending…

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