jQuery id optimisation

JavaScript performance comparison

Test case created by Matthias Le Brun

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<div id="foo"></div>
<script>
Benchmark.prototype.setup = function() {
    function getById(id){
      return new jQuery.fn.init(document.getElementById(id))
    }
   
    window.getById= getById
};
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
jQuery
jQuery("#foo")
pending…
optimized
getById("foo")
pending…

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