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

Run details:

User agent: Mozilla/5.0 (Linux; Android 13; SAMSUNG SM-G990B/G990BXXS3EWC4) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/20.0 Chrome/106.0.5249.126 Mobile Safari/537.36

Browser: Chrome Mobile 106

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
filter().map()	212.6 Ops/sec
flatMap()	62.0 Ops/sec

Script Preparation code:

var arr = [];
var i = 0;

while (i <= 1E5) arr[i] = i++;

Tests:

filter().map()
arr.filter(x => x % 3).map(x => x/100)
flatMap()
arr.flatMap(x => x % 3 ? x/100 : [])

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

flatMap vs filter map

filter().map()

flatMap()