Core Data mapping can be inefficient

[keeshux]

• [x] Sorting and filtering should be done in CoreDataRepository/NSFetchRequest rather than in ProfileListView
• [x] Insert/Update/Remove triggers NSFetchedResultsController.controllerDidChangeContent and reloads/remaps all profiles. Is this the best way?
• [x] Does save unique entity really require fetch + delete of existing? https://www.avanderlee.com/swift/constraints-core-data-entities/
• [x] Can NSFetchedResultsController.fetchedObjects be paginated?
• [x] Take CloudKit into account

[keeshux]

Modifying the fetch request You can’t change the fetch request to modify the results. Do the following if you want to change the fetch request:

1. Delete the cache if you’re using one, by calling deleteCache(withName:).
2. Change the fetch request.
3. Call performFetch().

[keeshux]

Reconsider in the future.