How to filter Core Data managed objects by NSPredicate?

Question

I need to filter the managed objects in the Core Data by NSPredicate. I tried two methods as below to do the filtering task.

• applying NSPredicate during the fetch request process.

• using NSPredicate in the array of all managed objects which provided by the fetch result controller.

Which method is more efficient?

Thanks

Answer 1

Using the NSPredicate on the fetch request would be more memory efficient I would imagine, since those objects are never loaded into memory.