Run results for: Array.map vs preallocation

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 128

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Preallocation

293/s

Map

67/s

View exact numbers

Test name	Executions per second
✓ Preallocation	293 Ops/sec
Map	67 Ops/sec

Tests:

Map
const array2 = new Array(1000000).fill(0).map((item, index) => index);
Preallocation
const array2 = new Array(1000000).fill(0); for (let i = 0; i < array2.length; i++) array2[i] = i;