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

getElementsByClassName()[0] vs querySelectorAll()[0] vs querySelector()

Benchmark created by d-_-b on August 22, 2010

Test runner

Ready to run.

Testing in
Test		Ops/sec
		ready
		ready
		ready

Revisions

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

Revision 1: published by d-_-b on August 22, 2010
Revision 2: published by Cristian S. on August 23, 2010
Revision 4: published by Pomyk on November 15, 2010