Run results for: for vs for of vs for in

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:138.0) Gecko/20100101 Firefox/138.0

Browser: Firefox 138

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

for

17K/s

for of

8K/s

for in

455/s

View exact numbers

Tests:

for
const arr = Array(10000).fill(0); const l = arr.length; for (let i = 0; i < l; i++) { arr[i]; }
for of
const arr = Array(10000).fill(0); for (let x of arr) { x; }
for in
const arr = Array(10000).fill(0); for (let i in arr) { arr[i]; }