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

test (v16)

Revision 16 of this benchmark created on October 2, 2013

Setup

var o = {1:1, 2:2};
    var n = 0;
    var s = 'string';

Test runner

Ready to run.

Testing in
Test		Ops/sec
1	`'undefined' === typeof s;`	ready
2	`undefined === s;`	ready

Revisions

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

Revision 1: published on August 21, 2013
Revision 2: published on August 21, 2013
Revision 3: published on August 22, 2013
Revision 4: published on August 27, 2013
Revision 5: published on September 3, 2013
Revision 6: published on September 20, 2013
Revision 7: published on September 21, 2013
Revision 8: published on September 22, 2013
Revision 10: published on September 24, 2013
Revision 11: published on September 24, 2013
Revision 12: published on September 24, 2013
Revision 13: published on October 2, 2013
Revision 14: published on October 2, 2013
Revision 15: published on October 2, 2013
Revision 16: published on October 2, 2013
Revision 17: published on October 7, 2013
Revision 18: published on October 7, 2013
Revision 19: published on October 18, 2013
Revision 20: published on October 18, 2013
Revision 21: published on October 23, 2013
Revision 22: published on October 28, 2013
Revision 23: published on October 31, 2013
Revision 24: published on November 1, 2013
Revision 25: published on November 7, 2013
Revision 26: published on November 8, 2013
Revision 27: published on January 5, 2014
Revision 28: published on January 7, 2014
Revision 29: published on January 7, 2014
Revision 30: published on January 11, 2014
Revision 31: published on January 12, 2014
Revision 32: published on January 14, 2014
Revision 33: published on January 14, 2014
Revision 34: published on January 15, 2014
Revision 35: published on January 20, 2014
Revision 36: published on January 22, 2014
Revision 37: published on January 22, 2014
Revision 38: published on February 13, 2014
Revision 39: published on February 19, 2014
Revision 40: published on February 19, 2014
Revision 41: published on February 19, 2014
Revision 42: published on February 25, 2014
Revision 43: published on March 29, 2014
Revision 44: published on May 6, 2014
Revision 45: published on May 7, 2014
Revision 46: published on May 7, 2014
Revision 47: published on May 12, 2014
Revision 48: published on May 12, 2014
Revision 49: published on June 1, 2014
Revision 50: published on June 8, 2014
Revision 51: published on June 8, 2014
Revision 52: published on June 11, 2014
Revision 53: published on June 11, 2014
Revision 54: published on June 24, 2014
Revision 55: published on June 24, 2014