Run results for: numberVar !== undefined VS typeof numberVar === number

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36

Browser: Chrome 137

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

typeof numberVar === number

165.8M/s

numberVar !== undefined

157.9M/s

View exact numbers

Test name	Executions per second
✓ typeof numberVar === number	165,794,208 Ops/sec
numberVar !== undefined	157,946,464 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Tests:

numberVar !== undefined
let numberVar = 0 const isNumber = numberVar !== undefined
typeof numberVar === number
let numberVar = 0 const isNumber = typeof numberVar === "number"