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

For While (v12)

Revision 12 of this benchmark created on September 14, 2012

Setup

var t = 1000000000,
        i = 0
        ii=-1;

Test runner

Ready to run.

Testing in
Test		Ops/sec
Lame For	`for(var j = 0; j < t; j++){}`	ready
Usual For	`for(i = 0; i < t; i++){}`	ready
Tweaked For	`for(; i < t; i++){}`	ready
Tweaked While	`while(++ii < t){}`	ready
While --	`while(t){t--}`	ready
For --	`for(; t; t--){}`	ready
++fOR	`for(var j = 0; j < t; ++j){}`	ready
Tweaked While --	`while(t--){}`	ready
Tweaked For --	`for(; t--; ){}`	ready
Extra Tweaked For	`for(; i < t; i+=1 ){}`	ready

Revisions

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

Revision 2: published on August 4, 2011
Revision 3: published on November 2, 2011
Revision 12: published on September 14, 2012