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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

reduce()

9.8M/s

filter().map()

7.1M/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);