Run results for: Regex vs startswith and slice

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36

Browser: Chrome 129

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Regex

4.9M/s

starts with and slice

3.6M/s

View exact numbers

Test name	Executions per second
✓ Regex	4,904,175 Ops/sec
starts with and slice	3,618,648 Ops/sec

Script Preparation code:

window.idregex = /^(?<type>investigation|surface|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('investigations') str.startsWith('surfaces') str.startsWith(type) const id = str.slice('shared'.length)