getElementsByClassName VS querySelectorAll

JavaScript performance comparison

Revision 80 of this test case created by

Preparation code

<div>
  <ul>
	<ul>
		<li><a href="#" name="name" class="classname">item 1</a></li>
		<ul>
			<li><a href="#" name="name" class="classname">item 1</a></li>
			<ul>
				<li><a href="#" name="name" class="classname">item 1</a></li>
			</ul>
		</ul>
	</ul>
    <li><a href="#" name="name" class="classname">item 10</a></li>
  </ul>
</div>
    

Preparation code output

<div> <ul> <ul> <li><a href="#" name="name" class="classname">item 1</a></li> <ul> <li><a href="#" name="name" class="classname">item 1</a></li> <ul> <li><a href="#" name="name" class="classname">item 1</a></li> </ul> </ul> </ul> <li><a href="#" name="name" class="classname">item 10</a></li> </ul> </div>

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
getElementsByClassName
nodes = document.getElementsByClassName('classname');
pending…
querySelectorAll
nodes = document.querySelectorAll('[class = classname]');
pending…

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