Run results for: Array.from vs map vs Array.from then map - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.3

Device Platform: Mobile

Date tested: 3 months ago

Test name	Executions per second
Array.from	353201.8 Ops/sec
Map	44316.6 Ops/sec
Loop	718241.4 Ops/sec
Loop push	222875.8 Ops/sec
Array.from and Map	188969.1 Ops/sec

Tests:

Array.from
Array.from({ length: 1000 }, i => i)
Map
new Array(1000).map(i => i);
Loop
const arr = new Array(1000); for (let i = 0; i < 1000; i++) arr[i] = i
Loop push
const arr = [] for (let i = 0; i < 1000; i++) arr.push(i)
Array.from and Map
Array.from({ length: 1000 }).map(i => i);