getElementsByClassName VS querySelectorAll

JavaScript performance comparison

Revision 65 of this test case created

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<div>
  <ul>
    <li><a href="#" name="name" class="classname subclassname">item 1</a></li>
    <li><a href="#" name="name" class="classname subclassname">item 2</a></li>
    <li><a href="#" name="name" class="classname subclassname">item 3</a></li>
    <li><a href="#" name="name" class="classname subclassname">item 4</a></li>
    <li><a href="#" name="name" class="classname subclassname">item 5</a></li>
    <li><a href="#" name="name" class="classname subclassname">item 6</a></li>
    <li><a href="#" name="name" class="classname subclassname">item 7</a></li>
    <li><a href="#" name="name" class="classname subclassname">item 8</a></li>
    <li><a href="#" name="name" class="classname subclassname">item 9</a></li>
    <li><a href="#" name="name" class="classname subclassname">item 10</a></li>
  </ul>
</div>
<script>
  var nodes;
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
getElementsByClassName
var nodes = document.getElementsByClassName('classname subclassname');
var arr = [];
for (var i = 0, max = nodes.length; i < max; i++) arr.push(nodes[i]);
pending…
querySelectorAll
var nodes = document.querySelectorAll('.classname.subclassname');
var arr = [];
for (var i = 0, max = nodes.length; i < max; i++) arr.push(nodes[i]);
pending…
jquery select
var nodes = $('.classname.subclassname');
var arr = [];
for (var i = 0, max = nodes.length; i < max; i++) arr.push(nodes[i]);
pending…

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