Run results for: JS string includes vs indexOf

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:80.0) Gecko/20100101 Firefox/80.0

Browser: Firefox 80

Operating system: Windows 7

Device Platform: Desktop

Date tested: 3 months ago

Test name	Executions per second
String.prototype.includes	38041.4 Ops/sec
String.prototype.indexOf	38038.7 Ops/sec

Script Preparation code:

var str = '';
var i = 0;

while (i <= 1E5) str += i++;
str += 'end';

Tests: