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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:65.0) Gecko/20100101 Firefox/65.0

Browser: Firefox 65

Operating system: Windows

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
for-in	68.0 Ops/sec
for-of	2448.5 Ops/sec
native	2394.3 Ops/sec
native - cache lengh	3168.9 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