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.

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Can be accessed at:

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typeof vs angular.isDefined() (v5)

Revision 5 of this benchmark created on October 1, 2014

Preparation HTML

<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.1.5/angular.min.js"></script>
<script>
var a;
</script>

Test runner

Ready to run.

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