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.

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Javascript selector vs id/class/all (v2)

Revision 2 of this benchmark created by William Manco on November 10, 2013

Preparation HTML

<div id="myid"></div>
<div class="myclass"></div>

Test runner

Ready to run.

Testing in
Test		Ops/sec
Selector ID	`document.getElementById('myid');`	ready
Selector Class	`document.getElementsByClassName('myclass');`	ready
Selector All -> ID	`document.querySelectorAll('#myid');`	ready
Selector All -> Class	`document.querySelectorAll('.myid');`	ready

Revisions

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

Revision 1: published by William Manco on November 9, 2013
Revision 2: published by William Manco on November 10, 2013