Run results for: substring vs regex

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/602.4.8 (KHTML, like Gecko) Version/10.0.3 Safari/602.4.8

Browser: Safari 10

Operating system: Mac OS X 10.12.3

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
substring	5483256.5 Ops/sec
regex	5960156.5 Ops/sec

Script Preparation code:

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\./,'');