Cocoa app layout with Core Data and lots of business logic?

While vector is great for handling your data that you are sampling (because of its support for dynamically resizing underlying storage), you may find that straight C arrays are sufficient (even better) for data that is already stored. This does add a level of complexity but it avoids a copy for data arrays that are already of a known and static size.

I think you may be reading into Core Data a bit too much. I'm not that experienced with it, so I speak as a non-expert, but there are basically two categories of data storage systems.

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