Run results for: Test for vs foreach vs forof

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:82.0) Gecko/20100101 Firefox/82.0

Browser: Firefox 82

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 3 years ago

Script Preparation code:

const COUNT = 10000;
var data = [];
for (let i = 0; i < COUNT; i++) {
    data[i] = i;
}

Tests:

for of
let i = 0; for (const item of data) { i++; } console.log(i);
foreach
let i = 0; data.forEach((item) => { i++; }); console.log(i);
for
let j = 0; let len = data.length; for (let i = 0; i < len; i++) { j++; } console.log(j);