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

querySelector vs getElementByClassName (v88)

Revision 88 of this benchmark created by Andre JS on August 27, 2019

Preparation HTML

<p class="foo">bar</p>

Test runner

Ready to run.

Testing in
Test		Ops/sec
querySelector	`var result = document.querySelector('.foo')[0];`	ready
getElementsByClassName	`var result = document.getElementsByClassName('.foo')[0];`	ready

Revisions

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

Revision 1: published by Andrew Hedges on September 20, 2010
Revision 3: published by Andrew Hedges on September 21, 2010
Revision 4: published by Ryan Grove on September 22, 2010
Revision 6: published by Kieran on September 22, 2010
Revision 8: published by Thomas Fuchs on September 22, 2010
Revision 11: published on August 5, 2011
Revision 15: published by Uuuuh on November 6, 2011
Revision 16: published by Uuuuh on November 6, 2011
Revision 17: published on November 19, 2011
Revision 18: published on November 19, 2011
Revision 19: published on November 19, 2011
Revision 20: published on November 19, 2011
Revision 21: published on November 19, 2011
Revision 22: published on November 24, 2011
Revision 23: published on November 24, 2011
Revision 24: published on November 24, 2011
Revision 25: published on December 7, 2011
Revision 26: published on January 17, 2012
Revision 27: published on January 26, 2012
Revision 31: published on April 3, 2012
Revision 32: published on April 4, 2012
Revision 33: published on April 10, 2012
Revision 34: published on April 11, 2012
Revision 35: published by hooriza on August 29, 2012
Revision 37: published on November 6, 2012
Revision 38: published on November 9, 2012
Revision 39: published by Owain Llewellyn on November 12, 2012
Revision 40: published on November 12, 2012
Revision 41: published on December 7, 2012
Revision 43: published on February 6, 2013
Revision 44: published by shwups on February 24, 2013
Revision 45: published by zibi on April 24, 2013
Revision 46: published on September 10, 2013
Revision 48: published on October 3, 2013
Revision 49: published by tomByrer on November 18, 2013
Revision 50: published on November 20, 2013
Revision 51: published on December 12, 2013
Revision 52: published by Skateside on April 23, 2014
Revision 53: published by Skateside on May 13, 2014
Revision 54: published on July 23, 2014
Revision 55: published on September 20, 2014
Revision 56: published on November 6, 2014
Revision 57: published on November 8, 2014
Revision 58: published by Larry Davis on November 24, 2014
Revision 61: published by no on December 23, 2014
Revision 62: published on February 12, 2015
Revision 63: published on February 12, 2015
Revision 64: published on February 12, 2015
Revision 65: published on February 12, 2015
Revision 66: published by Kapao on February 21, 2015
Revision 68: published on June 2, 2015
Revision 69: published on October 20, 2015
Revision 70: published on December 3, 2015
Revision 71: published on December 13, 2015
Revision 75: published by Andrey Kindin on November 26, 2018
Revision 76: published by Andrey Kindin on November 26, 2018
Revision 87: published by Argomix on July 3, 2019
Revision 88: published by Andre JS on August 27, 2019