Update master data if exists or create a new managed entity. Can I do it faster?

Question

I have the following code, and I was wondering if there is a way to do this faster. Basically, my application downloads some JSON (about 4000 records) from the network and updates or creates my managed objects based on data. This is pretty slow at the moment, and I understand why, but I'm new to basic data, so I was wondering if there is anything I can do to make it faster?

 NSFetchRequest *request = [[NSFetchRequest alloc] init];
 NSEntityDescription *entity = [NSEntityDescription entityForName:@"Company" inManagedObjectContext:managedObjectContext];
 [request setEntity:entity];
 NSMutableArray *coreDataArray = [[managedObjectContext executeFetchRequest:request error:nil] mutableCopy];
 [request release];

 for (NSDictionary *dict in arr) {
  NSArray *filtered = [coreDataArray filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"(code == %@)", [dict objectForKey:@"Code"]]];
  //NSLog(@"COREDATA ARRAY: %d FILTERED ARRAY: %d CODE: %@ COREDATA FIRST CODE: %@", [coreDataArray count], [filtered count], [dict objectForKey:@"Code"], [[coreDataArray objectAtIndex:0] code]);
  if ([filtered count] > 0) {
   Company *c = [filtered objectAtIndex:0];
   if ([dict objectForKey:@"Defunct"]) {
    NSLog(@"DELETED DEFUNCT COMPANY");
    [managedObjectContext deleteObject:c];
   } else {
    [c populateWithJSONDictionary:dict];
   }
  } else {
   Company *c = (Company *)[NSEntityDescription insertNewObjectForEntityForName:@"Company" inManagedObjectContext:managedObjectContext];
   [c populateWithJSONDictionary:dict];
  }

  float percent = (float)[arr indexOfObject:dict]/[arr count];
  [self performSelectorInBackground:@selector(updateProgressView:) withObject:[NSString stringWithFormat:@"%f",percent]];
 }

 [coreDataArray release];

Thanks so much for any help you can give.

Answer 1

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, Apple , Google site:developer.apple.com core data import performance