Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36
Chrome 67
Mac OS X 10.13.3
Desktop
6 years ago
Test name Executions per second
substring 9944454.0 Ops/sec
regex 7346216.0 Ops/sec
Script Preparation code:
AخA
 
var location = "example.com";
Tests:
  • substring

     
    var str=location;
    if (str.substring(0, 4)=="www.") str = str.substring(4);
  • regex

     
    var str=location.replace(/^www\./,'');