Run results for: JS string includes vs indexOf

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:138.0) Gecko/20100101 Firefox/138.0

Browser: Firefox 138

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

String.prototype.indexOf

503.1M/s

String.prototype.includes

500.1M/s

View exact numbers

Test name	Executions per second
✓ String.prototype.indexOf	503,111,488 Ops/sec
String.prototype.includes	500,115,808 Ops/sec

Script Preparation code:

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

Tests: