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

Fun stats

Benchmark created by inabahare on July 30, 2020

Setup

const arr = [];
  
  for (let i = 0; i < 10000; i++)
    arr.push(i);

Test runner

Ready to run.

Testing in
Test		Ops/sec
map	`arr.map(val => val * 2);`	ready
forEach	`arr.forEach(val => val * 2);`	ready
For	`for (let i = 0; i < arr.length; i++) arr[i] *= 2;`	ready
For in	`for (const i in arr) arr[i] *= 2;`	ready

Revisions

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

Revision 1: published by inabahare on July 30, 2020