Run results for: JS string includes vs indexOf

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

String.prototype.indexOf

1.1M/s

String.prototype.includes

392K/s

View exact numbers

Test name	Executions per second
✓ String.prototype.indexOf	1,105,090 Ops/sec
String.prototype.includes	392,381 Ops/sec

Script Preparation code:

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

Tests: