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

performance of parseInt()

Benchmark created by GlitchMr on April 26, 2012

Test runner

Ready to run.

Testing in
Test		Ops/sec
parseInt(x)	`parseInt('4')`	ready
parseInt(x, 10)	`parseInt('4', 10)`	ready
+x	`+'4'`	ready
~~x	`~~'4'`	ready
parseFloat(x)	`parseFloat('4')`	ready
Number(x)	`Number('4')`	ready
new Number(x)	`// Please note that new primitives are dangerous new Number('4')`	ready
Math.floor(x)	`Math.floor('4')`	ready
Math.ceil(x)	`Math.ceil('4')`	ready
Math.round()	`Math.round('4')`	ready

Revisions

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

Revision 1: published by GlitchMr on April 26, 2012
Revision 6: published on June 20, 2012
Revision 7: published on November 6, 2012
Revision 8: published on November 16, 2012
Revision 9: published on November 16, 2012
Revision 10: published on November 21, 2012
Revision 11: published on December 17, 2012
Revision 12: published on January 26, 2013
Revision 13: published on January 26, 2013
Revision 14: published on February 22, 2013
Revision 15: published on May 3, 2013
Revision 16: published on May 10, 2013
Revision 17: published on June 21, 2013
Revision 18: published on July 15, 2013
Revision 19: published on July 15, 2013
Revision 20: published on July 23, 2013
Revision 21: published on August 18, 2013
Revision 22: published by Wonderfool on August 20, 2013
Revision 23: published on August 21, 2013
Revision 24: published by Boris Guéry on November 1, 2013
Revision 25: published on November 3, 2013
Revision 26: published on November 19, 2013
Revision 27: published on December 18, 2013
Revision 28: published on December 18, 2013
Revision 29: published by Ardi on January 17, 2014
Revision 30: published by Zsolt on January 20, 2014
Revision 31: published by Jordan Pickwell on January 22, 2014
Revision 32: published by Henry Zou on January 24, 2014
Revision 33: published by Rob Adams on January 27, 2014
Revision 34: published by Tri on February 10, 2014
Revision 35: published by Tri on February 11, 2014
Revision 36: published on February 11, 2014
Revision 38: published on February 28, 2014
Revision 40: published by Rafael Xavier on May 26, 2014
Revision 41: published by Marty on June 3, 2014
Revision 42: published on June 17, 2014