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

Test name	Executions per second
for-in	4.4 Ops/sec
for-of	287.0 Ops/sec
native	94.5 Ops/sec
native - cache lengh	183.5 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]; } }

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

for-in

for-of

native

native - cache lengh