Run results for: startswith vs includes vs lastindexof

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_7_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.7 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.7.1

Device Platform: Mobile

Date tested: 10 months ago

Benchmark engine: Benchmark.js

lastIndexOf

58.7M/s

startsWith

51.2M/s

includes

31.1M/s

View exact numbers

Tests:

includes
const str = "https://firebase.com/this/is/a/long/thing" str.includes("firebase")
startsWith
const str = "https://firebase.com/this/is/a/long/thing" str.startsWith("https://firebase")
lastIndexOf
const str = "https://firebase.com/this/is/a/long/thing" str.lastIndexOf("https://firebase", 0)