Core Data Concurrency & Maintaining a Silky Smooth UI
Brian Boyle
707

What about old-style solution: using two MOCs — master and background independent context using NSManagedObjectContextDidSaveNotification. I suppose that passing data forth and back between worker and master contexts in your case will take a lot of time in a main thread eventhough nested MOCs solution is newer. Even if UI runs smoothly it still can be a bottleneck. Did you make any performance tests?

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