Run results for: Array initialization: preallocate vs push (Objects)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:136.0) Gecko/20100101 Firefox/136.0

Browser: Firefox 136

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Push

42/s

Preallocate

31/s

View exact numbers

Test name	Executions per second
✓ Push	42 Ops/sec
Preallocate	31 Ops/sec

Tests:

Preallocate
var N = 1000000; var result = new Array(N); for (var i = 0; i < N; i++) { result[i] = { value: N }; }
Push
var N = 1000000; var result = []; for (var i = 0; i < N; i++) { result.push({ value: N }); }