jQuery parent/child selectors

JavaScript performance comparison

Revision 4 of this test case created

Info

The different ways to select (context, pure selector, +find()) DOM elements using jQuery in parent/child scenarios.

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<div>
  <ul id="list">
    <li class="test">
    </li>
    <li>
    </li>
    <li class="test">
    </li>
    <li class="test">
    </li>
    <li>
    </li>
    <li class="test">
    </li>
    <li>
    </li>
    <li class="test">
    </li>
    <li>
    </li>
    <li class="test">
    </li>
  </ul>
</div>
<div class="test">
</div>
<script>
  var list = document.getElementById('list');
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
context
var $test = $('.test', list);
pending…
selector
var $test = $('#list .test');
pending…
context and find()
var $test = $(list).find('.test');
pending…
created context
var $test = $('.test', $('#list'));
pending…
selector and find
var $test = $('#list').find('.test');
pending…
parent/child selector
var $test = $('#list > .test');
pending…
immediate children
$test = $(list).children('.test');
pending…
find context
var $test = $('.test', $(list));
pending…

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