Run results for: Regex vs startswith and slice single

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0.1 Safari/605.1.15

Browser: Safari 18

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 7 days ago

Test name	Executions per second
Regex	5698649.0 Ops/sec
starts with and slice	11947730.0 Ops/sec

Script Preparation code:

window.idregex = /^(?<type>shared)(?<id>.*)$/
window.str = 'shared:dfhalsdkfjhasldfiuyo324987';

Tests:

Regex
const match = str.match(idregex) const type = match?.groups.type; const id = match?.groups.id
starts with and slice
const type = 'shared'; str.startsWith(type) const id = str.slice('shared'.length)