Run results for: loops-forin-forof-native-4

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36

Browser: Chrome 136

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

for-of

287/s

native - cache lengh

184/s

native

95/s

for-in

4/s

View exact numbers

Test name	Executions per second
✓ for-of	287 Ops/sec
native - cache lengh	184 Ops/sec
native	95 Ops/sec
for-in	4 Ops/sec

Script Preparation code:

var arr = [];
const randomizeArray = () => {
	for	(let i = 0; i < 50000; i++) {
		arr[i] = Math.floor(Math.random() * 100000);
	}
}

randomizeArray();

Tests:

for-in
let dummy = 0; for (let j = 0; j < 100; j++){ for (let i in arr) { dummy += i; } }
for-of
let dummy = 0; for (let j = 0; j < 100; j++){ for (let i of arr) { dummy += i; } }
native
let dummy = 0; for (let j = 0; j < 100; j++){ for (let i = 0; i < arr.length; i++) { dummy += arr[i]; } }
native - cache lengh
let dummy = 0; for (let j = 0; j < 100; j++){ let length = arr.length; for (let i = 0; i < length; i++) { dummy += arr[i]; } }