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

faster way to delete element

Benchmark created on April 4, 2025

Setup

const superBigArray = new Array(5000).fill(null);

Test runner

Ready to run.

Testing in
Test		Ops/sec
filter	`superBigArray.filter((el, i) => i !== 2222);`	ready
splice	`superBigArray.splice(2222, 1);`	ready
pop	`superBigArray[2222] = superBigArray[superBigArray.length - 1]; superBigArray.pop();`	ready
length set	`superBigArray[2222] = superBigArray[superBigArray.length - 1]; superBigArray.length = superBigArray.length - 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 April 4, 2025
Revision 2: published on April 4, 2025