Run results for: string concat and array.join v2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser: Chrome 126

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

join

53K/s

concat

51K/s

View exact numbers

Test name	Executions per second
✓ join	53,061 Ops/sec
concat	51,472 Ops/sec

Script Preparation code:

var characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

Tests:

concat
let result = ""; for (let i = 0; i < 40; i++) { result += characters.charAt(Math.floor(Math.random() * characters.length)); } return result;
join
let result = new Array(40); for (let i = 0; i < 40; i++) { result[i] = characters.charAt(Math.floor(Math.random() * characters.length)); } return result.join("");