Run results for: string array join vs for loop concatenation

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Browser: Chrome 128

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

join

182K/s

For loop

20K/s

View exact numbers

Test name	Executions per second
✓ join	181,637 Ops/sec
For loop	19,949 Ops/sec

Script Preparation code:

var strings = Array(1000).fill('hola soy edu feliz navidad');

Tests:

For loop
let result = '' for(let i = 0; i < strings.length; i++) { result += strings[i] + '\n'; }
join
const result = strings.join('\n');