Run results for: Array.from vs Array.fill vs [...Array].map

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.0 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 26

Operating system: iOS 18.6

Device Platform: Mobile

Date tested: 10 months ago

fill

690/s

from

551/s

spread

213/s

View exact numbers

Tests:

from
let n = 10000, length = 50 const result = [] for (let i = 0; i < n; ++i) { result.push(Array.from({length:length}).map((_, i) => i + 1)) }
fill
let n = 10000, length = 50 const result = [] for (let i = 0; i < n; ++i) { result.push(Array(length).fill(0).map((_,i) => i + 1)) }
spread
let n = 10000, length = 50 const result = [] for (let i = 0; i < n; ++i) { result.push([...Array(length)].map((_,i) => i + 1)) }