Run results for: Array initialization: preallocate vs push

Run details:

User agent: Mozilla/5.0 (Android 14; Mobile; rv:122.0) Gecko/122.0 Firefox/122.0

Browser: Firefox Mobile 122

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Push

13K/s

Preallocate

12K/s

View exact numbers

Test name	Executions per second
✓ Push	13,033 Ops/sec
Preallocate	11,879 Ops/sec

Tests:

Preallocate
var N = 10000; var result = new Array(N); for (var i = 0; i < N; i++) { result[i] = N; }
Push
var N = 10000; var result = []; for (var i = 0; i < N; i++) { result.push(N); }