Run results for: Regex vs startswith and slice single

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115.0

Browser: Firefox 115

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

starts with and slice

126.7M/s

Regex

4.2M/s

View exact numbers

Test name	Executions per second
✓ starts with and slice	126,688,216 Ops/sec
Regex	4,244,426 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)