Run results for: flatMap vs reduce vs filter.map v2

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:132.0) Gecko/20100101 Firefox/132.0

Browser: Firefox 132

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

reduce()

11.3M/s

filter().map()

5.9M/s

flatMap()

3.0M/s

View exact numbers

Script Preparation code:

var arr = Array.from({length: 20}, () => Math.floor(Math.random() * 100));;

Tests:

flatMap()
arr.flatMap((e) => e > 50 ? e / 2 : []);
reduce()
arr.reduce((acc, curr) => curr > 50 ? (acc.push(curr / 2), acc) : acc, []);
filter().map()
arr.filter((e) => e > 50).map((e) => e / 2);