Run results for: javascript startsWith() vs includes()

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.2 Safari/605.1.15

Browser: Safari 18

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one month ago

Test name	Executions per second
startsWith	72668456.0 Ops/sec
includes	54529056.0 Ops/sec

Tests:

startsWith
const str = "utm_source" str.startsWith("utm_")
AخA

const str = "utm_source"
str.startsWith("utm_")
includes
const str = "utm_source" str.includes("utm_")
const str = "utm_source"
str.includes("utm_")