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:

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pre-allocated arrays (v7)

Revision 7 of this benchmark created by ramesaliyev on March 20, 2013

Test runner

Ready to run.

Testing in
Test		Ops/sec
empty literal	`var arr = [];`	ready
pre-allocated array	`var arr = new Array(1000000);`	ready

Revisions

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

Revision 1: published by elus on June 12, 2012
Revision 2: published on November 12, 2012
Revision 6: published on February 4, 2013
Revision 7: published by ramesaliyev on March 20, 2013
Revision 8: published on May 21, 2013
Revision 9: published on June 10, 2013
Revision 10: published on June 10, 2013
Revision 11: published on June 11, 2013
Revision 12: published on June 11, 2013
Revision 13: published on June 20, 2013
Revision 14: published on July 25, 2013
Revision 15: published on August 6, 2013
Revision 16: published on August 25, 2013
Revision 17: published on August 30, 2013
Revision 18: published on September 2, 2013
Revision 19: published on September 2, 2013
Revision 20: published by NibbleByte on September 15, 2013
Revision 21: published by Calvin on September 19, 2013
Revision 22: published on October 10, 2013
Revision 23: published by satchmorun on October 20, 2013
Revision 24: published on November 1, 2013
Revision 25: published by sofia on November 5, 2013
Revision 27: published on December 11, 2013
Revision 28: published on December 22, 2013
Revision 29: published on January 7, 2014
Revision 30: published on January 15, 2014
Revision 32: published on January 23, 2014
Revision 33: published on January 29, 2014
Revision 34: published on February 11, 2014
Revision 35: published on March 11, 2014
Revision 36: published on March 14, 2014
Revision 37: published on April 16, 2014
Revision 38: published by Ivan on May 2, 2014
Revision 39: published on May 4, 2014
Revision 40: published on May 19, 2014
Revision 41: published by Oscar Campbell on June 18, 2014
Revision 42: published on June 18, 2014
Revision 43: published by Oscar Campbell on June 18, 2014
Revision 44: published on June 23, 2014
Revision 45: published by Lee Byron on August 20, 2014
Revision 46: published by Lee Byron on August 20, 2014
Revision 47: published on August 20, 2014
Revision 48: published by RobbertC5 on September 2, 2014
Revision 49: published by CC on October 10, 2014
Revision 50: published by asdasd on December 30, 2014
Revision 52: published by rock on January 17, 2015
Revision 53: published on January 28, 2015
Revision 54: published by Peter on February 2, 2015
Revision 55: published on February 11, 2015
Revision 56: published on March 24, 2015
Revision 57: published on March 24, 2015
Revision 58: published on March 24, 2015
Revision 59: published by Barfoo on March 30, 2015
Revision 60: published on April 21, 2015
Revision 61: published on April 21, 2015
Revision 62: published on August 20, 2015
Revision 63: published on October 23, 2015
Revision 64: published on October 27, 2015
Revision 65: published by shimscharf on November 26, 2015
Revision 66: published on November 28, 2015
Revision 67: published on December 1, 2015
Revision 68: published by Vasya on December 2, 2015