SuspendingClock how do I use it

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I;m trying to write a function that returns elapsed time in milliseconds. from the developer decimation it looks like I should use SuspendingClock. But beyond that I haven't got a clue. Any suggestions?

Answered by DTS Engineer in 904758022

If you subtract two suspending clock instants you get a Duration value:

let c = SuspendingClock()
let start = c.now
… your code here …
let end = c.now
let delta: Duration = end - start

That’s a 128-bit count of attoseconds. Use the components property to get seconds and attoseconds:

let (seconds, attoseconds) = delta.components

You can tidy this up with the measure(_:) method`:

let delta = c.measure {
    … your code here …
}

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

Answer 1

DTS Engineer OP

Apple

21h

Recommended

If you subtract two suspending clock instants you get a Duration value:

let c = SuspendingClock()
let start = c.now
… your code here …
let end = c.now
let delta: Duration = end - start

That’s a 128-bit count of attoseconds. Use the components property to get seconds and attoseconds:

let (seconds, attoseconds) = delta.components

You can tidy this up with the measure(_:) method`:

let delta = c.measure {
    … your code here …
}

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"