jQuery Find vs Selector

JavaScript performance comparison

Revision 5 of this test case created by Tony

Info

Test the speed between: $('#bob a') and $('#bob').find('a') $('#bob .class') and $('#bob').find('.class')

Preparation code

<div>
  <nav>
    <div id="bob">
      <span>
        Another Node
      </span>
      <span>
        Another Node
      </span>
      <span>
        Another Node
      </span>
      <span>
        Another Node
      </span>
      <span>
        Another Node
      </span>
      <span>
        Another Node
      </span>
      <span>
        Another Node
      </span>
      <span>
        Another Node
      </span>
      <a href="#" class="class">Bob's your uncle!</a>
      <span>
        Another Node
      </span>
      <span>
        Another Node
      </span>
      <span>
        Another Node
      </span>
      <span>
        Another Node
      </span>
      <span>
        Another Node
      </span>
      <span>
        Another Node
      </span>
      <span>
        Another Node
      </span>
      <span>
        Another Node
      </span>
    </div>
    <nav>
</div>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js">
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
Selector Search
jQuery(document).ready(function($) {
  $('#bob a').css({
    'text-decoration': 'none'
  });
});
pending…
Find Search
jQuery(document).ready(function($) {
  $('#bob').find('a').css({
    'text-decoration': 'none'
  });
});
pending…
Class Selector Search
jQuery(document).ready(function($) {
  $('#bob .class').css({
    'text-decoration': 'none'
  });
});
pending…
Find Class Search
jQuery(document).ready(function($) {
  $('#bob').find('.class').css({
    'text-decoration': 'none'
  });
});
pending…
Direct child
jQuery(document).ready(function($) {
  $('#bob > .class').css({
    'text-decoration': 'none'
  });
});
pending…
.children()
jQuery(document).ready(function($) {
  $('#bob').children('.class').css({
    'text-decoration': 'none'
  });
});
pending…

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