Run results for: string.includes vs string.indexOf

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:90.0) Gecko/20100101 Firefox/90.0

Browser: Firefox 90

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
includes	21954340.0 Ops/sec
indexOf	17510610.0 Ops/sec

Script Preparation code:

var a = "Mozilla/5.0 (Linux; Android 10; moto g(7) power Build/QCOS30.85-18-6; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/86.0.4240.185 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/294.0.0.39.118;]"

Tests:

includes
a.includes("Mobile")
indexOf
a.indexOf("Mobile") != -1