querySelectorAll vs getElementsByTagName

JavaScript performance comparison

Revision 28 of this test case created by Carl Letourneau

Preparation code

<div>
  <ul>
    <li><a href="#">item 1</a></li>
    <li><a href="#">item 2</a></li>
    <li><a href="#">item 3</a></li>
  </ul>
</div>
    

Preparation code output

<div> <ul> <li><a href="#">item 1</a></li> <li><a href="#">item 2</a></li> <li><a href="#">item 3</a></li> </ul> </div>

Test runner

Warning! For accurate results, please disable Firebug before running the tests. (Why?)

Java applet disabled.

Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
querySelectorAll
var nodes = document.querySelectorAll('a')
pending…
getElementsByTagName
var nodes = document.getElementsByTagName('a')
nodes.length
pending…

Compare results of other browsers

Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL.

0 Comments