Styling of R6 Classes feels a little slow

[sebffischer]

I am not sure exactly how styler works but I think the styling of R6 classes could be sped up and feels a little slow sometimes. I guess the problem is that it all happens in one big R6(...) function call, causing styler to restyle the whole R6 class each time it is formatted. Maybe caching could be somehow be improved here?

[lorenzwalthert]

Caching happens on two levels as explained in the vignette. I agree that it migth be slow for very big objects for that reason. R6 classes might be a good starting point for optimizing, but I think this issue is fundamentally #558, so I suggest to close it as a duplicate.