Run results for: for in loop vs. .map

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:144.0) Gecko/20100101 Firefox/144.0

Browser: Firefox 144

Operating system: Linux

Device Platform: Desktop

Date tested: 8 months ago

.map

25.0M/s

for loop

12.6M/s

View exact numbers

Test name	Executions per second
✓ .map	25,040,258 Ops/sec
for loop	12,591,840 Ops/sec

Script Preparation code:

// Create sample data
var array = [1,2,3,4,5,6,7,8,9,0];

var manipulateFn = num => {
	return num * 2 * 3;
}

Tests:

.map
const newArray = array.map(i => manipulateFn(i));
for loop
const newArray = []; for (let val of array) { newArray.push(manipulateFn(val)); }