Hello, I would use CoreData in order to mantain an archive of objects: each object contains an attribute called "uuid"; in the same db only one object can have the same attribute value. This mean I should validate the proposed new object to insert and check if the another object with the same uuid is inside the storage. I've implemented it with a fetch request but it's so slow when there are lots of objects to insert (my db contains around 30,000 objects). Any idea to improve performance of this check? Can CoreData support unique attributes as like key in sql database? Thanks mmc_______________________________________________
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