Run results for: .startsWith() vs. RegExp for short strings and short prefixes

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/110.0 pagestrip-debug

Browser: Firefox 110

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

.startsWith()

274K/s

RegExp

6K/s

View exact numbers

Test name	Executions per second
✓ .startsWith()	273,910 Ops/sec
RegExp	5,732 Ops/sec

Script Preparation code:

const regexp = new RegExp(/^\-\-/);
const prefix = "--";
const str = "--some-var";
const numTests = 10000;

Tests: