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

Array .concat() vs. .push() (v2)

Revision 2 of this benchmark created by Julio A. on March 3, 2011

Preparation HTML

<script>
  var arr = [1, 2, 3];
</script>

Test runner

Ready to run.

Testing in
Test		Ops/sec
.push()	`arr.push(4); arr.push(5); arr.push(6);`	ready
.concat()	`arr.concat([4, 5, 6]);`	ready

Revisions

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

Revision 1: published by Nyuszika7H on February 18, 2011
Revision 2: published by Julio A. on March 3, 2011
Revision 3: published on March 27, 2011
Revision 4: published on March 29, 2011
Revision 5: published by Tomasz Tu on April 8, 2011
Revision 8: published on April 25, 2011
Revision 9: published on April 25, 2011
Revision 10: published on August 15, 2011
Revision 11: published on August 28, 2011
Revision 12: published on September 5, 2011
Revision 13: published by Don Willis on November 14, 2011
Revision 14: published on March 9, 2012
Revision 16: published on January 4, 2013
Revision 17: published on May 17, 2013
Revision 18: published by fet on April 3, 2014
Revision 21: published by rvmn on July 24, 2014
Revision 23: published on November 11, 2014