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

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:129.0) Gecko/20100101 Firefox/129.0

Browser: Firefox 129

Operating system: Ubuntu

Device Platform: Desktop

Date tested: one year ago

reduce()

1K/s

flatMap()

759/s

filter().map()

328/s

View exact numbers

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 }, [])