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Run results for:
Array loop vs foreach vs map vs for of
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Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36
Browser:
Chrome 140
Operating system:
Windows
Device Platform:
Desktop
Date tested:
7 months ago
Test name
Executions per second
foreach
1490.7 Ops/sec
for
899.7 Ops/sec
map
1279.2 Ops/sec
for of
985.9 Ops/sec
Script Preparation code:
var arr = []; for (var i = 0; i < 100000; i++) { arr[i] = i; } function someFn(i) { return i * 3 * 8; }
Tests:
foreach
const res = [] arr.forEach(function (item){ res.push(someFn(item)) })
for
const res = [] for (var i = 0, len = arr.length; i < len; i++) { res.push(someFn(arr[i])) }
map
const res = arr.map(item => someFn(item))
for of
const res = [] for (const el of arr) { res.push(someFn(el)) }