Programatically get size of core data objects (byte)

Question

Is there a way to get programatically the size of a core data objects (in bytes )?

@Anoop: `NSData` and Core Data (`NSManagedObject`) are entirely different things. — Ole Begemann, Apr 10 '13 at 11:19
That's why i used `nsDataObj`. You can convert MangedObj to NSData and find. Hope [ManagedObject to Data](http://stackoverflow.com/questions/2357544/how-to-convert-an-nsarray-of-nsmanagedobjects-to-nsdata) will come handy. — Anoop Vaidya, Apr 10 '13 at 11:23
This should do the trick but what about the difference between the archived object size and the NSManagedObject object size ? — Alexandre, Apr 10 '13 at 11:33
Alexandre, please don't use salutations and thanks when asking the question. See [this](http://meta.stackexchange.com/questions/2950/should-hi-thanks-taglines-and-salutations-be-removed-from-posts) — Krishnabhadra, Apr 10 '13 at 11:37

score 1 · Answer 1 · edited May 23 '17 at 10:28

1

Here, existed SO thread to convert NSManagedObjectID into NSData

NSURL * url = [[YOUROBJECT objectID] URIRepresentation];
NSData * urlData = [NSKeyedArchiver archivedDataWithRootObject:url];
NSLog(@"Data Length :%d",[urlData length]);

edited May 23 '17 at 10:28

Community

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answered Apr 10 '13 at 11:41

Vedchi

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I'm sorry I though that this worked but it gives me the size of the reference and not the size of the saved object. – Alexandre Apr 12 '13 at 15:46

score 0 · Answer 2 · answered May 18 '16 at 12:42

you can use below code for calculating both array and sum of individual NSManagedObject

- (void) calculateSize {

     NSFetchRequest *request = [[NSFetchRequest alloc] initWithEntityName:@"Event"];

     NSArray *data = [self.managedObjectContext executeFetchRequest:request error:nil];

     NSLog(@"Size of %@: %zd", NSStringFromClass([data class]), malloc_size((__bridge const void *) data));


     int totalSize = 0;
     for(NSManagedObject *object in data)
     {
        totalSize += malloc_size((__bridge const void *) object);
     }
     NSLog(@"Managed Object Size total:%d", totalSize);
}

Programatically get size of core data objects (byte)

2 Answers2