Run results for: how fast is regex?

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser: Chrome 134

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 18 days ago

Test name	Executions per second
instantiate new regex	14238132.0 Ops/sec
use existing regex	14546399.0 Ops/sec

Script Preparation code:

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

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

Tests:

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