Run results for: how fast is regex3?

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

just make a regex

168.5M/s

just make a string

155.1M/s

instantiate new regex

16.0M/s

use existing regex

13.1M/s

View exact numbers

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, "\\$&")
just make a regex
const newOne = /[.*+?^${}()|[\]\\]/g;
just make a string
const blah = "foo"