Run results for: Array construct vs array push vs array concat

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36

Browser: Chrome 138

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

array push

490K/s

array concat

8K/s

array construct

3K/s

View exact numbers

Tests:

array construct
let a = []; for(let i=0; i <= 1000; i=i+1) { a = [...a, i ]; };
array push
const a = []; for(let i=0; i <= 1000; i = i + 1) { a.push(i); };
array concat
let a = []; for(let i=0; i <= 1000; i = i + 1) { a = a.concat([i]); };