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

undefineds (v5)

Revision 5 of this benchmark created by legrus on May 24, 2011

Setup

var _;

Test runner

Ready to run.

Testing in
Test		Ops/sec
undefined	`undefined`	ready
void 0	`void 0`	ready
""._	`""._`	ready
1.._	`1.._`	ready
[]._	`[]._`	ready
variable _	`_`	ready
var _	`var _`	ready
0[0]	`0[0]`	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 Jed Schmidt on May 21, 2011
Revision 2: published by John-David Dalton on May 21, 2011
Revision 3: published by Jed Schmidt on May 22, 2011
Revision 4: published on May 22, 2011
Revision 5: published by legrus on May 24, 2011
Revision 7: published by subzey on July 29, 2011