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

js-null-undefined-equality (v7)

Revision 7 of this benchmark created on February 9, 2013

Preparation HTML

<script>
  var x, y =null;
</script>

Test runner

Ready to run.

Testing in
Test		Ops/sec
Boolean(undefined)	`Boolean(x)`	ready
Boolean(null)	`Boolean(y)`	ready

Revisions

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

Revision 1: published on September 2, 2011
Revision 2: published by KooiInc on September 2, 2011
Revision 3: published on September 2, 2011
Revision 4: published by Matt on June 18, 2012
Revision 5: published on July 29, 2012
Revision 6: published on July 30, 2012
Revision 7: published on February 9, 2013
Revision 8: published by Andy on August 1, 2013
Revision 10: published on December 14, 2013
Revision 12: published on June 24, 2014
Revision 13: published on July 17, 2014
Revision 14: published on July 25, 2014