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Run results for:
for vs foreach vs for..in vs for..of zzz4
Compare loop performance
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Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36 Edg/128.0.0.0
Browser:
Chrome 128
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
for
212.5 Ops/sec
foreach
2369.1 Ops/sec
for in
330.2 Ops/sec
for..of
12211.5 Ops/sec
for2
212.5 Ops/sec
Script Preparation code:
var array = new Array(100000); for (let i = 0; i < 100000; ++i) { array[i] = i; }
Tests:
for
let s = 0; for (var i = 0; i < array.length; i++) { s+=array[i]; } console.log(s)
foreach
let s = 0; array.forEach(function(n) { s+=n; }); console.log(s)
for in
let s = 0; for (const n in array) { s+=n; } console.log(s)
for..of
let s = 0; for (const n of array) { s+=n; } console.log(s)
for2
let s = 0; for (let i = 0; i < array.length; i++) { s+=array[i]; } console.log(s)