What exactly causes shader cache stuttering?

[Gamedominator06]

So, it's a large scale issue with a lot of research involved in it then. This is a bit of an assumption (as I haven't actually used it), but the Ishiruuka branch exists for the purpose of temporarily getting around these issues in a messier fashion for better performance then? I imagine this is something that won't get a proper workaround for a while although at least its impact isn't substantial.