Run results for: how fast is regex?

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:150.0) Gecko/20100101 Firefox/150.0

Browser: Firefox 150

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 3 months ago

instantiate new regex

35.6M/s

use existing regex

34.6M/s

View exact numbers

Test name	Executions per second
✓ instantiate new regex	35,607,608 Ops/sec
use existing regex	34,647,956 Ops/sec

Script Preparation code:

const prepared = /[.*+?^${}()|[\]\\]/g;

Tests:

instantiate new regex
const blah = "whatever" const r = blah.replace(/[.*+?^${}()|[\]\\]/g, "\\$&")
use existing regex
const blah = "whatever" const r = blah.replace(prepared, "\\$&")