Run results for: flatMap vs for...of

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 14_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 14

Operating system: iOS 14.6

Device Platform: Mobile

Date tested: 2 years ago

Script Preparation code:

xs = new Array(1000).fill("world")

Tests:

flatMap
xs.flatMap((x) => ["hello", x])
for of
const out = [] for (const x of xs) { out.push("hello"); out.push(x); } return out
forEach
const out = [] xs.forEach( (x) => { out.push("hello"); out.push(x); }) return out;