Run results for: lodash partition vs forEach with array spread iterator vs array push vs for each with concat vs two filters with 10000

Run details:

User agent: Mozilla/5.0 (Linux; Android 12; M2102J20SG) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.5481.192 Mobile Safari/537.36 OPR/74.1.3922.71199

Browser: Opera Mobile 74

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
Lodash partition	8334.3 Ops/sec
forEach with push	11641.5 Ops/sec
forEach with spread	19.7 Ops/sec
forEach with concat	4.2 Ops/sec
two filters	6952.4 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 with push
let a = [], b = []; let result = tabl.forEach(item => {if (item%2) {a.push(item)} else {b.push(item)}})
forEach with spread
let a = [], b = []; let result = tabl.forEach(item => {if (item%2) {a = [...a, item]} else {b = [...b, item]}})
forEach with concat
let a = [], b = []; let result = tabl.forEach(item => {if (item%2) {a = a.concat(item)} else {b = b.concat(item)}})
two filters
a = tabl.filter(item => item % 2) b = tabl.filter(item => !item % 2)

Run results for: lodash partition vs forEach with array spread iterator vs array push vs for each with concat vs two filters with 10000

Lodash partition

forEach with push

forEach with spread

forEach with concat

two filters