Run results for: StartsWith vs Regex

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36

Browser: Chrome 80

Operating system: Mac OS X 10.15.3

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
startsWith	1320353.0 Ops/sec
regex	1498822.0 Ops/sec

Script Preparation code:

var str = "http://www.wehkamp.nl/";
var str2 = "wehkamp.nl/baby/pampers";
var str3 = "/baby/pampers";

Tests:

startsWith
var k = str && !str.startsWith('/') && !str.startsWith('http') var k2 = str2 && !str2.startsWith('/') && !str2.startsWith('http') var k3 = str3 && !str3.startsWith('/') && !str3.startsWith('http')
regex
var k = str && !(/^(http|\/)/).test(str) var k2 = str2 && !(/^(http|\/)/).test(str2) var k3 = str3 && !(/^(http|\/)/).test(str3)