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Run results for: how fast is regex3?

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Run details:
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
Chrome 133
Mac OS X 10.15.7
Desktop
18 days ago
Test name Executions per second
instantiate new regex 15960742.0 Ops/sec
use existing regex 13052096.0 Ops/sec
just make a regex 168466000.0 Ops/sec
just make a string 155052112.0 Ops/sec
Script Preparation code:
AخA
 
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"