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

.map().join() vs .reduce()

Benchmark created by agegorin on February 2, 2017

Setup

const arr = [{text:'0'},{text:'1'},{text:'2'},{text:'3'},{text:'4'},{text:'5'},{text:'6'},{text:'7'},{text:'8'},{text:'9'}];

Test runner

Ready to run.

Testing in
Test		Ops/sec
.map().join()	`arr.map((item) => item.text).join('');`	ready
.reduce()	`arr.reduce((r, b) => r + b.text, '');`	ready

Revisions

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

Revision 1: published by agegorin on February 2, 2017