On Mon, April 20, 2009 11:02 am, Jerry Krinock wrote: > Makes me wonder why NSFetchRequest even supports a predicate, since > its predicate has all these limitations and is supposedly more > expensive when compared to fetching all objects and then using - > [NSArray filteredArrayWithPredicate:] ? It would have saved me a day > on the learning curve had it not been there for me to hang myself with. >
filteredArrayWithPredicate: is only an option if you have a relatively small dataset. There's overhead to loading an object into memory, both in terms of memory and CPU cycles. Doing filtering in memory is a code smell. It generally signals that you're fetching against the wrong entity, or that your model needs to be tweaked to be more efficient. +Melissa _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
