getById vs document.getElementById

JavaScript performance comparison

Revision 2 of this test case created by Josh

Info

Test the overhead of adding a single function to to wrap document.getElementById()

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<div id="test"></div>
<script>
  function getById(id) { return document.getElementById(id); }
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
getById
var x = getById('test')
pending…
getElementById
var x = document.getElementById('test')
pending…
jQuery
var x = $('#test')
pending…

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