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

typeof vs angular.isDefined() (v7)

Revision 7 of this benchmark created by Joshua Jacobson on December 16, 2014

Preparation HTML

<script src="//code.angularjs.org/snapshot/angular.js"></script>
<script>
var a;
</script>

Test runner

Ready to run.

Testing in
Test		Ops/sec
typeof undefined	`typeof a !== 'undefined'`	ready
angular.isDefined	`angular.isDefined(a)`	ready

Revisions

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

Revision 1: published on July 23, 2013
Revision 2: published on August 16, 2013
Revision 4: published on October 1, 2014
Revision 5: published on October 1, 2014
Revision 6: published on October 22, 2014
Revision 7: published by Joshua Jacobson on December 16, 2014
Revision 8: published by Ross on January 23, 2015
Revision 9: published on February 18, 2015
Revision 10: published on February 18, 2015