Run results for: Sting prototype indexOf vs includes performance

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.2 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 26

Operating system: iOS 18.7

Device Platform: Mobile

Date tested: 6 months ago

indexOf

687.5M/s

includes

31.2M/s

View exact numbers

Test name	Executions per second
✓ indexOf	687,527,488 Ops/sec
includes	31,214,024 Ops/sec

Script Preparation code:

const string = "Quite a random string, which is not too long, but not too short neither";

Tests: