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

Push vs Unshift vs Iteration

Benchmark created on

Setup

const arr = new Array(10_000_000).fill(0);

Test runner

Ready to run.

Testing in
Test		Ops/sec
Push	`arr.unshift(1);`	ready
Unshift	`for(const _ of arr){}`	ready
Iterate	`arr.push(1);`	ready

Revisions

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

Revision 1: published on