Run results for: JavaScript for() vs for..in vs forEach() vs _.forEach() vs _.forEachRight()

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36

Browser: Chrome 70

Operating system: Linux

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
for()	94705470.0 Ops/sec
forEach()	35191200.0 Ops/sec

HTML Preparation code:

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

Tests:

Native for()
let arr = [0,1,2,3,4,5,6,7,8,9]; let acum = 0; for (let i = 0; i < arr.length; i += 1) { acum += arr[i]; }
Native for..in
let arr = [0,1,2,3,4,5,6,7,8,9]; let acum = 0; for (let item in arr) { acum += item; }
Native forEach()
let arr = [0,1,2,3,4,5,6,7,8,9]; let acum = 0; arr.forEach(function (item) {acum += item});
Lodash _.forEach()
let arr = [0,1,2,3,4,5,6,7,8,9]; let acum = 0; _.forEach(arr, function (item) {acum += item});
Lodash _.forEachRight()
let arr = [0,1,2,3,4,5,6,7,8,9]; let acum = 0; _.forEachRight(arr, function (item) {acum += item});