Run results for: regex vs substring compare

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36 Edg/132.0.0.0

Browser: Chrome 132

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

substring

57.4M/s

regex

5.7M/s

View exact numbers

Test name	Executions per second
✓ substring	57,419,048 Ops/sec
regex	5,650,700 Ops/sec

Script Preparation code:

const link = "https://stats.nba.com";
const linkRegex = new RegExp(/^(http|www)/i);

Tests:

regex
const link = "https://stats.nba.com"; const linkRegex = new RegExp(/^(http|www)/i); if(link.match(linkRegex) !== null){}
substring
const link = "https://stats.nba.com"; const start = link.substring(0,3); if(start === 'htt' || start === 'www'){}