Run results for: JS string includes vs indexOf

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.4 Safari/605.1.15

Browser: Safari 18

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

String.prototype.indexOf

506K/s

String.prototype.includes

124K/s

View exact numbers

Test name	Executions per second
✓ String.prototype.indexOf	505,621 Ops/sec
String.prototype.includes	124,485 Ops/sec

Script Preparation code:

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

Tests: