jsPerf.app is an online JavaScript performance benchmark test runner & jsperf.com mirror. It is a complete rewrite in homage to the once excellent jsperf.com now with hopefully a more modern & maintainable codebase.

jsperf.com URLs are mirrored at the same path, e.g:

https://jsperf.com/negative-modulo/2

Can be accessed at:

https://jsperf.app/negative-modulo/2

$('class') versus $(getElementByClassName) (v9)

Revision 9 of this benchmark created on August 7, 2014

Preparation HTML

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>

<div id="div"></div>

Test runner

Ready to run.

Testing in
Test		Ops/sec
$('class')	`$(document.getElementById('div'))`	ready
getElementByClassName	`document.getElementById('div')`	ready

Revisions

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

Revision 1: published on July 21, 2013
Revision 2: published on November 8, 2013
Revision 3: published by Ricardo Graça on January 24, 2014
Revision 4: published on June 13, 2014
Revision 5: published on July 2, 2014
Revision 6: published on July 2, 2014
Revision 7: published on July 23, 2014
Revision 8: published on August 6, 2014
Revision 9: published on August 7, 2014