Run results for: JS string includes vs indexOf

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:122.0) Gecko/20100101 Firefox/122.0

Browser: Firefox 122

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

String.prototype.indexOf

1960.9M/s

String.prototype.includes

120K/s

View exact numbers

Test name	Executions per second
✓ String.prototype.indexOf	1,960,882,176 Ops/sec
String.prototype.includes	120,462 Ops/sec

Script Preparation code:

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

Tests: