Run results for: JS string includes vs indexOf

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.101 Safari/537.36

Browser: Chrome 87

Operating system: Linux

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
String.prototype.includes	122948.7 Ops/sec
String.prototype.indexOf	4770052.0 Ops/sec

Script Preparation code:

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

Tests: