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

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Mobile Safari/537.36 EdgA/142.0.0.0

Browser: Chrome Mobile 142

Operating system: Android

Device Platform: Mobile

Date tested: 10 months ago

Benchmark engine: Benchmark.js

Array.prototype.push

17.4M/s

index assignment

12.8M/s

View exact numbers

Test name	Executions per second
✓ Array.prototype.push	17,425,166 Ops/sec
index assignment	12,804,802 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