jQuery.data vs jQuery().data

JavaScript performance comparison

Revision 67 of this test case created by mdale

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<div id="el" class="cat dog fish size-large"></div>
<script>
  var i = 0,
      el = document.getElementById('el'),
      $el = $(el);
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
jQuery.data
var arr = jQuery.grep( $el.attr('class').split(" "), function( str ){
     return ( str.indexOf('size-') === 0 )
})[0];
 
pending…
jQuery.fn.data
var getFromVar = "cat dog fish size-large";
var arr = jQuery.grep( getFromVar.split(" "), function( str ){
     return ( str.indexOf('size-') === 0 )
})[0];
pending…

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