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

Empty array (v103)

Revision 103 of this benchmark created by Justin Ormont on July 30, 2014

Setup

var arr = [{
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }, {
    a: 1,
    b: "2"
  }];

Test runner

Ready to run.

Testing in
Test		Ops/sec
while pop variable	`var len = arr.length; while (len) { arr.pop(); len -= 1; }`	ready
length	`arr.length = 0;`	ready
splice	`arr.splice(0, arr.length);`	ready
pop	`while (arr.length) { arr.pop(); }`	ready
shift	`while (arr.length) { arr.shift(); }`	ready
new	`arr = []`	ready
pop2	`while (arr.pop());`	ready
reverse for pop	`var len; for (len = arr.length; len > 0; len--) { arr.pop(); }`	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 4, 2012
Revision 2: published by Simon on December 25, 2012
Revision 3: published by huang47 on December 27, 2012
Revision 4: published on January 6, 2013
Revision 6: published on April 8, 2013
Revision 9: published on April 9, 2013
Revision 10: published on April 9, 2013
Revision 11: published on April 9, 2013
Revision 14: published on April 13, 2013
Revision 15: published on April 13, 2013
Revision 21: published by Allan on May 14, 2013
Revision 22: published on May 22, 2013
Revision 23: published on May 23, 2013
Revision 24: published on May 29, 2013
Revision 26: published by eTagTechnologies.Inc on June 10, 2013
Revision 28: published by Isaac on June 10, 2013
Revision 29: published on June 12, 2013
Revision 30: published on June 13, 2013
Revision 31: published by Tom Taylor on June 17, 2013
Revision 32: published on June 25, 2013
Revision 34: published on June 27, 2013
Revision 36: published on July 3, 2013
Revision 37: published on July 8, 2013
Revision 39: published on August 9, 2013
Revision 40: published on August 17, 2013
Revision 41: published on August 30, 2013
Revision 42: published by Ryan on September 5, 2013
Revision 43: published by ly tran on September 5, 2013
Revision 44: published on September 13, 2013
Revision 45: published on October 10, 2013
Revision 46: published on October 22, 2013
Revision 49: published on November 20, 2013
Revision 50: published on November 21, 2013
Revision 52: published by Tim Tucker on November 22, 2013
Revision 53: published by TimTucker on November 22, 2013
Revision 54: published on November 26, 2013
Revision 55: published on December 3, 2013
Revision 59: published on December 18, 2013
Revision 60: published by Madevilts on January 13, 2014
Revision 61: published on January 17, 2014
Revision 62: published on January 30, 2014
Revision 64: published on February 24, 2014
Revision 66: published on February 26, 2014
Revision 67: published on February 26, 2014
Revision 70: published by Nickdouille on March 17, 2014
Revision 71: published on March 19, 2014
Revision 72: published by Johan Telstad on March 24, 2014
Revision 73: published on March 24, 2014
Revision 74: published by Johan Telstad on March 25, 2014
Revision 75: published by Mario on April 4, 2014
Revision 76: published by Adri on April 4, 2014
Revision 78: published by Ray Brooks on April 7, 2014
Revision 80: published on April 9, 2014
Revision 81: published on April 10, 2014
Revision 82: published on April 30, 2014
Revision 83: published on May 2, 2014
Revision 85: published on May 13, 2014
Revision 86: published on May 13, 2014
Revision 87: published by Jasper on May 13, 2014
Revision 88: published on May 13, 2014
Revision 89: published on May 15, 2014
Revision 90: published on May 16, 2014
Revision 91: published on May 31, 2014
Revision 92: published on June 3, 2014
Revision 93: published on June 12, 2014
Revision 94: published on June 12, 2014
Revision 96: published on June 15, 2014
Revision 97: published on June 15, 2014
Revision 98: published on June 20, 2014
Revision 99: published on July 8, 2014
Revision 100: published on July 19, 2014
Revision 101: published on July 22, 2014
Revision 102: published on July 30, 2014
Revision 103: published by Justin Ormont on July 30, 2014
Revision 104: published on August 2, 2014
Revision 105: published on August 6, 2014
Revision 106: published on August 6, 2014
Revision 107: published on August 6, 2014
Revision 108: published on August 14, 2014
Revision 109: published by Alex Paluzzi on August 15, 2014
Revision 110: published by John Smith on August 22, 2014
Revision 111: published by Russell Dempsey on August 25, 2014
Revision 112: published on August 26, 2014
Revision 113: published on August 26, 2014
Revision 114: published by Kiren on August 27, 2014
Revision 115: published on August 27, 2014
Revision 116: published on August 28, 2014
Revision 117: published on August 29, 2014
Revision 118: published on August 29, 2014
Revision 119: published on August 29, 2014
Revision 120: published on August 29, 2014
Revision 121: published by jfeldt on September 4, 2014
Revision 122: published by Mientjan on September 10, 2014
Revision 123: published on September 11, 2014
Revision 124: published on September 12, 2014
Revision 125: published by MR on September 12, 2014
Revision 126: published on September 16, 2014
Revision 127: published on September 30, 2014
Revision 128: published on September 30, 2014
Revision 129: published on October 4, 2014
Revision 130: published on October 7, 2014
Revision 131: published on October 15, 2014
Revision 132: published on October 15, 2014
Revision 135: published on November 19, 2014
Revision 136: published by cache object properties on November 25, 2014
Revision 137: published by Devin on November 28, 2014
Revision 142: published on December 17, 2014
Revision 144: published on December 29, 2014
Revision 147: published by David Scott on January 30, 2015
Revision 151: published by Philippe on February 17, 2015
Revision 152: published on February 17, 2015
Revision 157: published by Will on February 25, 2015
Revision 159: published on March 4, 2015
Revision 160: published by Nuno on March 12, 2015
Revision 165: published by MH on April 2, 2015
Revision 166: published by muffin on April 7, 2015
Revision 171: published by Irmantas on April 21, 2015
Revision 174: published by Dallas62 on May 9, 2015
Revision 178: published on June 2, 2015
Revision 187: published on September 12, 2015
Revision 192: published on October 30, 2015
Revision 200: published on December 7, 2015
Revision 206: published by Vihan Bhargava on December 29, 2015
Revision 210: published on December 30, 2015
Revision 214: published by David Kirk on February 6, 2016
Revision 216: published on February 8, 2016
Revision 223: published on February 25, 2016
Revision 236: published on April 8, 2020