Run results for: Javascript Array.prototype.push vs index assignment

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:146.0) Gecko/20100101 Firefox/146.0

Browser: Firefox 146

Operating system: Windows

Device Platform: Desktop

Date tested: 9 months ago

Benchmark engine: Benchmark.js

index assignment

40.2M/s

Array.prototype.push

40.1M/s

View exact numbers

Test name	Executions per second
✓ index assignment	40,177,384 Ops/sec
Array.prototype.push	40,054,316 Ops/sec

Tests:

Array.prototype.push
const arr = [1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3] arr.push(4)
index assignment
const arr = [1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3] arr[arr.length] = 4