We all remember from before, that DigitalWrite were pretty slow before, - so people came up with digitalFastWrite and/or libraries like DigitalIO
Some used more direct, C-like commands instead of digitalWrite.
My question is, are all these "challenges" solved today ? - on 328 based controllers as well ? Is there any significant difference (for time critical applications, or that will free some processing power) between the digitalWrite and the mantioned methods ?