Run results for: lodash partition vs forEach with array push vs two filter loops

Run details:

User agent: Mozilla/5.0 (Linux; Android 9; SAMSUNG SM-J730F) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/14.2 Chrome/87.0.4280.141 Mobile Safari/537.36

Browser: Chrome Mobile 87

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
Lodash partition	1547.8 Ops/sec
forEach	543.9 Ops/sec
double filter	95.3 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var tabl = Array.from({ length: 10000 }).map((value, i) => i)

Tests:

Lodash partition
let result = _.partition(tabl, v => v%2)
forEach
let a = [], b = []; let result = tabl.forEach(item => {if (item%2) {a.push(item)} else {b.push(item)}})
double filter
const a = tabl.filter(item => item%2); const b = tabl.filter(item => !item%2);

Run results for: lodash partition vs forEach with array push vs two filter loops

Lodash partition

forEach

double filter