Benchmark: flatMap() vs filter().map() vs reduce vs for

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 : [])
reduce
arr.reduce((acc, n) => { if (n % 3) return n/100; return acc; }, []);
for loop
const doubled = [] for (const number of arr) { if (number % 3) doubled.push(number / 100) }

Rendered benchmark preparation results:

Previous results

ⓘ Get performance results from real users on your website with Request Metrics.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36

Browser/OS: Chrome 103 on Linux

flatMap() vs filter().map() vs reduce vs for (version: 0)