Re: How long a Function takes to execute ?

If you just want to measure the time consumed for executing a function, you can write something like this:

func someFunc() {
    //Time consuming something...
    var a = ""
    for i in 0..<1_000_000 {
        a += String(i)
    }
    _ = a
}


let start = Date()
someFunc()
let end = Date()
let consumedTime = end.timeIntervalSince(start)
print(consumedTime) //->0.06515908241271973

If you need something more, you may need to be more specific:

- What do you want? Do you want any sort of UI update?

- What does your function do?

You could do it using performance unit tests:

• https://indiestack.com/2018/02/xcodes-secret-performance-tests/
• https://developer.apple.com/library/archive/documentation/ToolsLanguages/Conceptual/Xcode_Overview/UnitTesting.html