Question by Abscissa · Oct 13, 2013 at 01:50 AM · ios plugin slow native

Docs say managed-to-unmanaged calls are very slow on iOS. Why? Will it be fixed?

The page states:

"Managed-to-unmanaged calls are quite processor intensive on iOS. Try to avoid calling multiple native methods per frame."

Why are they so slow? And is it an iOS issue, an issue with Mono on iOS, or a Unity issue? Can it be fixed? Will it be fixed?

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VioKyma · Oct 13, 2013 at 03:00 AM 0

Managed to Unmanaged calls are usually slightly more intensive because of the switch in context. In a business app, this 'slight' increase is often not a problem, but when you're making games it becomes more of a problem. Whether it is possible to fix is debatable. I will leave it to those more qualified, but you're probably going to find that it can only really be "optimised" rather than fixed.

For example, on a Windows machine using c# to call unmanaged code in the Windows API, the calls there are not very quick either.