Thanks for quick reply.
This is only hobby, so might not go direct access and code seems to become so complicated to read, at least to me it does. It was good to point out how slow digitalRead() and digitalWrite() are, I just get light bulb moment and figured out where I lose so much time, on my current project. It was the reason to ask for more speed.
Seems like my stepper pulsing subroutine is written by idiot, well it´s not that bad, but should split on three different subroutines. My subroutine reads all user buttons on every half step and requirement is only for one button.
But this might be suitable time to start checking more powerful alternatives anyway, there are more projects to come 