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

2 strict 1 non-strict

Benchmark created on October 16, 2024

Description

checking for not null or not undefined - what is faster? !==, !== or ==

Test runner

Ready to run.

Testing in
Test		Ops/sec
two strict	`undefined !== null && undefined !== undefined`	ready
one lazy	`undefined == null`	ready
two strict null	`null !== null && null !== undefined`	ready
truthy	`!!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 October 16, 2024