Run results for: For Each Vs Map Example Medium

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:63.0) Gecko/20100101 Firefox/63.0

Browser: Firefox 63

Operating system: Windows 7

Device Platform: Desktop

Date tested: 6 years ago

Test name	Executions per second
.map	40795160.0 Ops/sec
.forEach	36181820.0 Ops/sec

Script Preparation code:

// Create sample data
var array = [];
array.forEach( i => array.push(i) );

var manipulateFn = num => {
	return num * 2 * 3;
}

Tests:

.map
var newArray = array.map( i => manipulateFn(i));
.forEach
var newArray = []; array.forEach( i => { newArray.push(manipulateFn(i)); });