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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Browser: Chrome 109

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
.map().flat()	0.8 Ops/sec
.flatMap()	1.0 Ops/sec

Script Preparation code:

var arr = [];

for (let i = 0; i < 10000000; i++) {
    arr.push({nested: [i]});
}

Tests: