Run results for: flatMap() vs filter().map() vs reduce() v4

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 YaBrowser/23.7.5.734 Yowser/2.5 Safari/537.36

Browser: Yandex Browser 23

Operating system: Windows

Device Platform: Desktop

Date tested: 7 months ago

Test name	Executions per second
filter().map()	235.0 Ops/sec
flatMap()	122.6 Ops/sec
reduce()	645.1 Ops/sec

Script Preparation code:

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

Tests:

filter().map()
arr.filter(x => x % 12).filter(x => x % 5).filter(x => x % 3).map(x => x/100)
flatMap()
arr.flatMap(x => x % 12 && x % 5 && x % 3 ? x/100 : [])
reduce()
arr.reduce((newArray, x) => { if (x % 12 && x % 5 && x % 3) { newArray.push(x / 100) } return newArray }, [])

Run results for: flatMap() vs filter().map() vs reduce() v4

flatMap vs filter map vs reduce()

filter().map()

flatMap()

reduce()