Data attribute vs.jQuery().data

JavaScript performance comparison

Revision 19 of this test case created

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<div id="el"></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
Data attribute
k = Math.floor(Math.random() * 1001)
$el.attr('data-key-' + k, 'val-' + Math.floor(Math.random() * 1001));
$el.attr("data-key-" + k);
pending…
jQuery.fn.data
k = Math.floor(Math.random() * 1001)
$el.data('key-' + k, 'val-' + Math.floor(Math.random() * 1001));
$el.data("key-" + k);
pending…

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