Run results for: Split vs Substring + IndexOf

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36 Edg/131.0.0.0

Browser: Chrome 131

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Split

225/s

Substring

205/s

View exact numbers

Test name	Executions per second
✓ Split	225 Ops/sec
Substring	205 Ops/sec

HTML Preparation code:

<div id='xx'></div>

Script Preparation code:

let email = 'TestUser2137@example.com';
let times = 1000;

Tests:

Split
let x = 0; while (x < times) { const userName = email.split('@')[0]; console.log(userName); x += 1; }
Substring
let x = 0; while (x < times) { const userName = email.substring(0, email.indexOf('@')); console.log(userName); x += 1; }