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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
startsWith	38493576.0 Ops/sec
includes	102971520.0 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_")