Run results for: map vs flatMap

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
map	0.0 Ops/sec
flatMap	10707.3 Ops/sec

Script Preparation code:

var arrayOfArrays = Array(1000).fill().map(el => Array(10).fill(1));
var flattenedArray = arrayOfArrays.flat();

Tests:

map
const map = (array) => { return map(i => i) } map(flattenedArray);
flatMap
const flatMap = (array) => { return array.flatMap(i => i); } flatMap(arrayOfArrays);