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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36

Browser: Chrome 145

Operating system: Windows

Device Platform: Desktop

Date tested: 5 months ago

Loop

1.3M/s

Map

490K/s

Loop push

292K/s

Array.from and Map

21K/s

Array.from

21K/s

View exact numbers

Test name	Executions per second
✓ Loop	1,298,604 Ops/sec
Map	489,537 Ops/sec
Loop push	291,528 Ops/sec
Array.from and Map	21,335 Ops/sec
Array.from	20,810 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);