Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.162 Safari/537.36
Chrome 80
Mac OS X 10.15.4
Desktop
4 years ago
Test name Executions per second
regex 41427.2 Ops/sec
noregex 42028.7 Ops/sec
Script Preparation code:
AخA
 
var a = "/1231231"
var b = "121312321"
Tests:
  • regex

     
    console.log(/^\//.test(a));
    console.log(/^\//.test(b));
  • noregex

     
    console.log(a.startsWith("/"))
    console.log(b.startsWith("/"))