Run results for: Array slice vs for loop vs spread (new Array)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.2 Safari/605.1.15

Browser: Safari 26

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 6 months ago

push

314.6M/s

slice

149.7M/s

Spread

72.0M/s

View exact numbers

Script Preparation code:

const data = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0];

Tests:

slice
const copy = data.slice(0, 5);
push
const copy = new Array(5); for (let i = 0; i < 5; i++) { copy[i] = data[i]; }
Spread
const copy = [...data]