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.

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Number() vs parseInt() vs plus (v11)

Revision 11 of this benchmark created on March 15, 2011

Preparation HTML

<script>
  var i = '10000';
  i += 'b';
  i = i.slice(0, i.length - 1);
  assert(i === '10000');
</script>

Test runner

Ready to run.

Testing in
Test		Ops/sec
Number Constructor	`Number(i)`	ready
parseInt	`parseInt(i)`	ready
Plus operator	`+i`	ready

Revisions

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

Revision 1: published by Pat Cavit on August 17, 2010
Revision 2: published by Leonardo Dutra on August 17, 2010
Revision 3: published by Tom on August 18, 2010
Revision 4: published on September 14, 2010
Revision 5: published by ecmanaut on September 19, 2010
Revision 6: published by Alex on October 29, 2010
Revision 7: published by David Hammond on November 18, 2010
Revision 11: published on March 15, 2011
Revision 12: published on September 20, 2011
Revision 13: published on December 28, 2011
Revision 14: published on January 1, 2012
Revision 15: published on January 1, 2012
Revision 16: published on January 2, 2012
Revision 17: published on January 2, 2012
Revision 18: published on January 2, 2012
Revision 19: published on January 2, 2012
Revision 20: published on January 18, 2012
Revision 21: published on January 18, 2012
Revision 22: published on January 22, 2012
Revision 23: published on January 22, 2012
Revision 24: published on February 23, 2012
Revision 25: published on March 19, 2013
Revision 26: published by Marcin on March 19, 2013
Revision 27: published on March 20, 2013
Revision 28: published by attic on September 10, 2013
Revision 29: published on February 21, 2014
Revision 30: published on March 25, 2014
Revision 32: published by Petr NevyhoÅ¡tÄ›nÃ½ on May 17, 2014
Revision 33: published on May 17, 2014
Revision 34: published by anru on May 19, 2014
Revision 35: published on June 6, 2014
Revision 37: published on July 18, 2014
Revision 38: published on July 18, 2014
Revision 39: published on July 26, 2014
Revision 40: published on August 6, 2014
Revision 41: published on August 12, 2014
Revision 42: published on August 29, 2014
Revision 43: published on September 6, 2014
Revision 44: published on September 11, 2014
Revision 45: published by Austin on September 15, 2014
Revision 46: published on October 22, 2014
Revision 47: published by JokesOnYou77 on November 3, 2014
Revision 48: published by Joshua Wise on November 6, 2014
Revision 49: published on November 24, 2014
Revision 50: published on December 5, 2014
Revision 51: published by Denis on December 25, 2014
Revision 52: published by Leo Dutra on December 26, 2014
Revision 53: published on January 14, 2015
Revision 54: published on January 26, 2015
Revision 56: published by Alex on February 12, 2015
Revision 57: published on February 25, 2015
Revision 58: published on February 24, 2015
Revision 59: published on February 25, 2015
Revision 60: published on February 25, 2015
Revision 61: published on February 24, 2015
Revision 62: published on February 25, 2015
Revision 63: published on March 2, 2015
Revision 65: published by BananaAcid on March 10, 2015
Revision 66: published on March 16, 2015
Revision 67: published by Adam Stankiewicz on March 17, 2015
Revision 68: published by Ginden on March 17, 2015
Revision 69: published by Ginden on March 17, 2015
Revision 70: published on March 19, 2015
Revision 71: published on March 19, 2015
Revision 72: published by Namikaze Ray aka Pendechosne on March 25, 2015
Revision 73: published by Mario Karagiorgas on March 27, 2015
Revision 74: published by Salvo on March 29, 2015
Revision 75: published by Mario Karagiorgas on March 30, 2015
Revision 76: published on April 7, 2015
Revision 78: published by me on April 8, 2015
Revision 79: published by Joshua Wise on April 18, 2015
Revision 80: published on May 6, 2015
Revision 82: published on May 7, 2015
Revision 83: published on May 14, 2015
Revision 84: published on May 22, 2015
Revision 85: published on May 29, 2015
Revision 87: published on June 5, 2015
Revision 88: published on June 5, 2015
Revision 89: published by pashoo on June 5, 2015
Revision 90: published on July 28, 2015
Revision 91: published on July 28, 2015
Revision 92: published on July 28, 2015
Revision 94: published on August 21, 2015
Revision 95: published on August 21, 2015
Revision 97: published on October 6, 2015
Revision 98: published on October 19, 2015
Revision 99: published by me on October 26, 2015
Revision 100: published on October 30, 2015
Revision 102: published on December 1, 2015
Revision 103: published on January 6, 2016
Revision 104: published on January 8, 2016
Revision 122: published on March 29, 2017
Revision 123: published on March 29, 2017
Revision 124: published on March 29, 2017
Revision 125: published on May 2, 2017
Revision 128: published by DavidB on June 2, 2017