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

regexp test vs indexOf (v95)

Revision 95 of this benchmark created on December 13, 2013

Preparation HTML

<script>
  var str = "hello World!";
  var reg = /world/i;
</script>

Test runner

Ready to run.

Testing in
Test		Ops/sec
Regexp	`reg.test(str);`	ready
indexOf	`str.toLocaleLowerCase().indexOf("world");`	ready

Revisions

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

Revision 1: published by Dan Deming on April 9, 2015
Revision 2: published on April 10, 2015
Revision 3: published by ConsciousCode on April 17, 2015
Revision 4: published by Sreejith on April 20, 2015
Revision 5: published on April 24, 2015
Revision 6: published on April 27, 2015
Revision 7: published on April 28, 2015
Revision 8: published on May 3, 2015
Revision 9: published by HA on December 21, 2011
Revision 10: published by Ross on June 3, 2015
Revision 11: published by Marco on June 11, 2015
Revision 12: published on June 16, 2015
Revision 13: published by weee on August 6, 2015
Revision 14: published by Andrew on August 10, 2015
Revision 15: published on September 14, 2015
Revision 16: published by Guntars on September 23, 2015
Revision 17: published by Ronny on October 14, 2015
Revision 18: published by Thiago Nobre on October 28, 2015
Revision 19: published on June 27, 2012
Revision 20: published on June 29, 2012
Revision 21: published on November 13, 2015
Revision 22: published on December 13, 2015
Revision 23: published on December 16, 2015
Revision 24: published on December 17, 2015
Revision 25: published on December 17, 2015
Revision 26: published on December 17, 2015
Revision 27: published on December 17, 2015
Revision 29: published on January 27, 2016
Revision 30: published by microfed on February 6, 2016
Revision 32: published on March 2, 2016
Revision 33: published on March 3, 2016
Revision 39: published on September 10, 2012
Revision 40: published on September 10, 2012
Revision 41: published by ariel on September 29, 2012
Revision 43: published on October 18, 2012
Revision 44: published on October 18, 2012
Revision 46: published on December 17, 2012
Revision 47: published on January 5, 2013
Revision 49: published on February 16, 2013
Revision 52: published on February 22, 2013
Revision 55: published on March 6, 2013
Revision 56: published on March 6, 2013
Revision 57: published on March 6, 2013
Revision 58: published on March 6, 2013
Revision 59: published on March 6, 2013
Revision 60: published on March 6, 2013
Revision 61: published by fgsfds on March 6, 2013
Revision 64: published by fgsfds on March 6, 2013
Revision 65: published by fgsfds on March 6, 2013
Revision 68: published by benny on April 1, 2013
Revision 70: published on May 10, 2013
Revision 71: published by JoePeck on May 11, 2013
Revision 73: published by Jarrod on May 24, 2013
Revision 74: published on June 4, 2013
Revision 76: published on June 19, 2013
Revision 77: published on July 2, 2013
Revision 78: published on July 28, 2013
Revision 79: published by Sebastian Janzen on August 6, 2013
Revision 83: published on August 23, 2013
Revision 84: published on August 30, 2013
Revision 85: published by Dean Landolt on September 10, 2013
Revision 87: published on October 11, 2013
Revision 88: published by steefow on October 15, 2013
Revision 90: published on October 31, 2013
Revision 91: published on November 6, 2013
Revision 92: published on November 6, 2013
Revision 94: published by SpeedySan on December 9, 2013
Revision 95: published on December 13, 2013
Revision 96: published on December 13, 2013
Revision 97: published by Fergal on December 18, 2013
Revision 98: published by PiranhaGreg on January 2, 2014
Revision 99: published by c24w on January 9, 2014
Revision 101: published by Jack on February 12, 2014
Revision 102: published on February 13, 2014
Revision 103: published by Roberto on February 18, 2014
Revision 104: published on February 25, 2014
Revision 105: published on March 10, 2014
Revision 107: published on March 21, 2014
Revision 108: published by Aaron on March 26, 2014
Revision 109: published on March 30, 2014
Revision 110: published on April 24, 2014
Revision 111: published on April 24, 2014
Revision 114: published on April 29, 2014
Revision 115: published by jonschlinkert on May 14, 2014
Revision 116: published by Tom Guy on May 21, 2014
Revision 117: published on May 21, 2014
Revision 118: published by V on May 30, 2014
Revision 119: published on June 13, 2014
Revision 120: published by Timothy on June 16, 2014
Revision 121: published on June 19, 2014
Revision 122: published on June 19, 2014
Revision 123: published by muthukumar on July 7, 2014
Revision 124: published on July 7, 2014
Revision 125: published on July 18, 2014
Revision 126: published on July 18, 2014
Revision 127: published on July 18, 2014
Revision 128: published on July 18, 2014
Revision 129: published on July 19, 2014
Revision 130: published on July 20, 2014
Revision 131: published on July 23, 2014
Revision 132: published on August 1, 2014
Revision 133: published on August 1, 2014
Revision 134: published on August 2, 2014
Revision 136: published on August 8, 2014
Revision 137: published on August 9, 2014
Revision 138: published on August 10, 2014
Revision 139: published on August 10, 2014
Revision 142: published on September 2, 2014
Revision 143: published by Igor Andrade on September 15, 2014
Revision 144: published on September 23, 2014
Revision 145: published on September 23, 2014
Revision 146: published on September 23, 2014
Revision 147: published on September 25, 2014
Revision 148: published on September 25, 2014
Revision 149: published on September 25, 2014
Revision 151: published by oriman on September 30, 2014
Revision 152: published by Yogesh Mangaj on October 7, 2014
Revision 153: published on October 20, 2014
Revision 154: published on October 20, 2014
Revision 155: published on October 31, 2014
Revision 157: published by Matt on November 8, 2014
Revision 158: published on December 3, 2014
Revision 159: published by posinskadpilot on December 4, 2014
Revision 160: published by posinskadpilot on December 4, 2014
Revision 161: published on December 8, 2014
Revision 162: published on December 11, 2014
Revision 163: published on December 11, 2014
Revision 164: published on December 12, 2014
Revision 165: published by Shahar on December 25, 2014
Revision 166: published by Shahar on December 25, 2014