Run results for: Array loop vs foreach vs map vs for of

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/81.0.4044.122 Chrome/81.0.4044.122 Safari/537.36

Browser: Chromium 81

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 4 years ago

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)) }