Hi Ralph,
I was playing with bayonetta when his support was added in vorpX 18.1.0 and the frame rate was OK.
But, yesterday I tried to play again, but the low frame rate prevented me.
It looks like something has broken in latest release of vorpx or maybe an update of the game.
Performance may depend on the location/level though, so as a first trouble shooting step I would suggest to load a different savegame. Also check whether you maybe have changed graphics settings compared to before, same for GPU driver settings. Antialising may impact performance quite heavily in some games for example, although I don’t think it does in this case.