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

Run details:

User agent: Mozilla/5.0 (Linux; Android 12; M2103K19G) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Mobile Safari/537.36 OPR/64.1.3282.59829

Browser: Opera Mobile 64

Operating system: Android

Device Platform: Mobile

Date tested: 2 months ago

Test name	Executions per second
filter().map()	86.5 Ops/sec
flatMap()	30.8 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()