Comment by u1hcw9nx
4 days ago
If you go far beyond nanoseconds, energy becomes a limiting factor. You can only achieve ultra-fast processing if you dedicate vast amounts of matter to heat dissipation and energy generation. Think on a galactic scale: you cannot have even have molecular reaction speeds occurring at femtosecond or attosecond speeds constantly and everywhere without overheating everything.
Maybe. It's not clear whether these are fundamental limits or merely technological ones. Reversible (i.e. infinitely efficient) computing is theoretically possible.
Reversible computing is not infinitely efficient, because irreversible operations, e.g. memory erasing, cannot be completely avoided.
However, the computing efficiency could be greatly increased by employing reversible operations whenever possible and there are chances that this will be done in the future, but the efficiency will remain far from infinite.
If you have a black hole as an infinite heat sink this helps a great deal.
Black holes have a maximum growth rate
By infinite I mean a black hole gets COLDER as you add mass and energy to it.