jquery selector speed

JavaScript performance comparison

Revision 41 of this test case created by Tom Taylor

Preparation code

<div id="container">
  <ul>
    <li>
      1
    </li>
    <li class="target">
      2
    </li>
    <li id="target">
      3
    </li>
  </ul>
</div>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>

Preparation code output

  • 1
  • 2
  • 3

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Testing in unknown unknown
Test Ops/sec
$('#target')
$('#target').css('border', '1px solid red');
pending…
$('#container .target')
$('#container .target').css('border', '1px solid red');
pending…
$('li.target')
$('li.target').css('border', '1px solid red');
pending…
$('.target')
$('.target').css('border', '1px solid red');
pending…
$('#container ul li.target')
$('#container ul li.target').css('border', '1px solid red');
pending…
$('ul li.target')
$('ul li.target').css('border', '1px solid red');
pending…
$('div#container ul li.target')
$('div#container ul li.target').css('border', '1px solid red');
pending…
$('li#target')
$('li#target').css('border', '1px solid red');
pending…
$('#target','#container ul')
$('#target','#container ul').css('border', '1px solid red');
pending…
$('#target',$(this).parent())
$('#target',$(this).parent()).css('border', '1px solid red');
pending…
$('.target',$(this).parent())
$('.target',$(this).parent()).css('border', '1px solid red');
pending…

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