Run results for: flatmap

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.4 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 15

Operating system: iOS 15.4

Device Platform: Mobile

Date tested: 2 years ago

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]; }