Run results for: for vs foreach vs for..in vs for..of sum

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser: Chrome 134

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

for..of

12.5M/s

foreach

7.9M/s

cached for

7.5M/s

for

5.4M/s

for in

737K/s

View exact numbers

Script Preparation code:

var array = new Array(100).fill(1);

Tests:

for
let sum = 0; for (let i = 0; i < array.length; i++) { sum += array[i]; }
foreach
let sum = 0; array.forEach(value => { sum += value; });
for in
let sum = 0; for (let i in array) { sum += array[i]; }
for..of
let sum = 0; for (let value of array) { sum += value; }
cached for
let sum = 0, len = array.length; for (let i = 0; i < len; i++) { sum += array[i]; }