Run results for: Array.prototype.concat vs spread operator 2023

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Array.prototype.concat

319K/s

Spread operator

178K/s

View exact numbers

Test name	Executions per second
✓ Array.prototype.concat	319,415 Ops/sec
Spread operator	178,494 Ops/sec

Tests:

Array.prototype.concat
const a = Array(1000).fill('a'); const b = Array(1000).fill('b'); const ab = a.concat(b);
Spread operator
const a = Array(1000).fill('a'); const b = Array(1000).fill('b'); const ab = [...a, ...b];