Run results for: Fastest way to do string includes string (ignoring locale)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

.indexOf

16.2M/s

includes

16.1M/s

regex case insensi

6.3M/s

regex case sensi

5.6M/s

View exact numbers

Script Preparation code:

window.myString = 'a looooooong string who knows how Long'
window.regexpI = new RegExp('long', 'i');
window.regexp = new RegExp('long');

Tests: