Run results for: Array initialization: preallocate a typed array vs vanilla preallocation

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Preallocate vanilla

248K/s

Preallocate typed

197K/s

View exact numbers

Test name	Executions per second
✓ Preallocate vanilla	248,428 Ops/sec
Preallocate typed	196,727 Ops/sec

Tests:

Preallocate typed
var N = 10000; var result = new Uint8Array(N); for (var i = 0; i < N; i++) { result[i] = i; }
Preallocate vanilla
var N = 10000; var result = new Array(N); for (var i = 0; i < N; i++) { result[i] = i; }