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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undefinedDetect (v2)

Revision 2 of this benchmark created on March 24, 2015

Setup

var myVar = true;

Test runner

Ready to run.

Testing in
Test		Ops/sec
typeof triple equal	`if (typeof myVar === "undefined") false;`	ready
typeof double equal	`if (typeof myVar == "undefined") false;`	ready
simple equal	`if (myVar === undefined) false;`	ready

Revisions

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

Revision 1: published by Kousha on March 12, 2015
Revision 2: published on March 24, 2015