Ryan Joseph via fpc-pascal <fpc-pascal@lists.freepascal.org> schrieb am Di., 16. Feb. 2021, 19:21:
> > > > There we have: > > > > * slower creation of the class, because each implemented interface adds > another VMT reference to the class which needs to be initialized. > > How bad is this? We need to make a test case we can profile. For example > if you have a game that creates 1000 classes 60 frames per second. If > adding interfaces to the classes hurts this process we may have a deal > breaker. > If you need to create 1000 class instances each frame then you have a flaw in your logic in my opinion. > > * slow reference counting. Especially if it is thread safe and exception > safe with the implicit exception block > > It's a whole other topic but FPC needs opt-in ARC at the language level > for classes. Interfaces are not only slow but then you need to pass around > a reference to the interface instead of the class you actually care about. > It makes no sense to me whatsoever. > Interfaces are not slow because they are are interfaces! When you call a interface method it has the same costs as a virtual method call! And the cost for reference counting that interfaces have right now would be there for ARC as well. Regards, Sven >
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