Run results for: JS Object Creation vs Pooling

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36 Edg/137.0.0.0

Browser: Chrome 137

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Pooling

15K/s

Dynamic Creation

7K/s

View exact numbers

Test name	Executions per second
✓ Pooling	15,159 Ops/sec
Dynamic Creation	6,563 Ops/sec

Script Preparation code:

const n = 10000
var arr = new Array(n).fill(0);
for (let i = 0; i < n; i++) {
  arr[i] = i;
}

Tests:

Dynamic Creation
const result = []; for (let i = 0; i < arr.length; i++) { result.push({ x: arr[i], y: arr[i] + 1 }); }
Pooling
const result = []; const obj = { x: 0, y: 0 }; for (let i = 0; i < arr.length; i++) { obj.x = arr[i]; obj.y = arr[i] + 1; result.push(obj); }