Run results for: IndexOf vs Includes vs Reg StartsWith vs Reg Includes in string

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:108.0) Gecko/20100101 Firefox/108.0

Browser: Firefox 108

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
IndexOf	1281394688.0 Ops/sec
Includes	28000906.0 Ops/sec
Reg StartWith	39431868.0 Ops/sec
Reg Includes	22704714.0 Ops/sec

Script Preparation code:

var string = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.';

	var matcherSW = new RegExp("^tempor","i");
	var matcherInc = new RegExp("tempor","i");

Tests:

IndexOf
string.indexOf('tempor')
Includes
string.includes('tempor')
Reg StartWith
matcherSW.test(string)
Reg Includes
matcherInc.test(string)

Run results for: IndexOf vs Includes vs Reg StartsWith vs Reg Includes in string

Banana

IndexOf

Includes

Reg StartWith

Reg Includes