Run results for: flatMap() vs map() and flat()

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

flatMap()

109/s

map().flat()

96/s

View exact numbers

Test name	Executions per second
✓ flatMap()	109 Ops/sec
map().flat()	96 Ops/sec

Script Preparation code:

var arr = [];
var i = 0;

while (i <= 1E5) arr[i] = {
    num: [1, i++]
};

Tests: