Run results for: Array initialization: preallocate vs push with objects

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:140.0) Gecko/20100101 Firefox/140.0

Browser: Firefox 140

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Push

43K/s

Preallocate

39K/s

View exact numbers

Test name	Executions per second
✓ Push	43,137 Ops/sec
Preallocate	39,280 Ops/sec

Tests:

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