The user keyboard appears with a delay of ~ 5 seconds

Question

I am creating a custom keyboard with obj-c, Xcode 7 (also tried 6). The problem is that the keyboard loads too slowly.
I tried to load a completely empty UIInputViewControllerview - no change. I have no xibs, no heavy resources. If someone knows any solution to this problem, write the answer. the user will not be happy to wait every time the keyboard falls behind.

Answer 1

It is known that the keyboard (user-defined or not) can slowly load when the application is first launched after the application is launched.
This happens only in debug mode and should not happen when creating an assembly due to the high level of optimization.