An initial sync saves 100,000 records into Core Data, memory climbs to 1GB and the app gets killed, and the UI freezes the whole time. What do you think the causes are?
The cause is creating 100,000 objects on the main context and saving once at the end. An NSManagedObject stays registered in the context until the save, so memory piles up, and the work is on the main queue, so the UI freezes.
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