Run results for: JS string includes vs indexOf

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/111.0

Browser: Firefox 111

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
String.prototype.includes	48206.8 Ops/sec
String.prototype.indexOf	995340096.0 Ops/sec

Script Preparation code:

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

Tests: