jquery selector speed

JavaScript performance comparison

Revision 6 of this test case created

Preparation code

<div id="wrapper">
</div>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<script>
  $(function(){
  for (var i = 0; i < 1000; ++i) {
    if (i == 501) {
      $('#wrapper').append('\
      <div id="container"><ul>\
          <li>1</li>\
          <li class="target">2</li>\
          <li>3</li>\
      </ul></div>'
);
    }
   else {
    $('#wrapper').append('\
      <div><div><div><ul>\
          <li class="target">1</li>\
          <li class="target2">2</li>\
          <li class="target3">3</li>\
      </ul></div></div></div>'
);
  }
  }});
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
$('div#container ul li.target')
$('div#container ul li.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…

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