Benchmark: flatmap - MeasureThat.net

Script Preparation code:

var a = new Map();
for (let i=0;i<1000;i++) {
	a.set('x'+i, {p:['a', 'b', 'c']});
}

Tests:

Array from with map + flat
const res = Array.from(a.values(), (val) => val.p).flat();
Array push + flat
const b = []; for (let v of a.values()) { b.push(v.p); } const res = b.flat();
spread
let res = []; for (let v of a.values()) { res = [...res, ...v.p]; }

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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.36

Browser/OS: Chrome 102 on Windows

flatmap (version: 4)