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

jQuery Tag vs ClassName

Benchmark created on May 10, 2011

Preparation HTML

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<div id="foo">
    <ul class="list">
        <li>lorem ipsum</li>
    </ul>
</div>

Test runner

Ready to run.

Testing in
Test		Ops/sec
Tag	`$('ul');`	ready
ClassName	`$('.list');`	ready
Tag & ClassName	`$('ul.list');`	ready
Find by ClassName	`$('#foo').find('.list');`	ready
Find by Tag & ClassName	`$('#foo').find('ul.list');`	ready
Children	`$('#foo').children();`	ready
Children by ClassName	`$('#foo').children('.list');`	ready
Children by Tag & ClassName	`$('#foo').children('ul.list');`	ready
Context	`$('#foo .list');`	ready
Context with Tag	`$('#foo ul.list');`	ready

Revisions

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

Revision 1: published on May 10, 2011