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

Check if div exists (v5)

Revision 5 of this benchmark created on June 3, 2013

Preparation HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<div class="a"></div>

Setup

var a = $('.a');

Test runner

Ready to run.

Testing in
Test		Ops/sec
Property Lookup	`a[0]`	ready
.length	`a.length`	ready
.size()	`a.size()`	ready
.is:visible	`a.is(':visible')`	ready
.length > 0	`a.length > 0`	ready

Revisions

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

Revision 1: published on April 10, 2013
Revision 2: published on April 25, 2013
Revision 3: published by Eli Perelman on May 2, 2013
Revision 4: published by garrett f on May 9, 2013
Revision 5: published on June 3, 2013
Revision 6: published on August 20, 2013
Revision 7: published on September 15, 2013
Revision 9: published on August 13, 2014
Revision 10: published by antonio on August 21, 2015
Revision 11: published by Antonio on August 21, 2015
Revision 13: published on January 21, 2016
Revision 14: published on January 21, 2016