I have an Employee entity with the attribute userInfo, which is a binary data type that stores some NSDictionary of key-value pairs.
With time, as the user uses the app, "garbage" will pile up (albeit gradually) in these dictionaries that are associated with the employees. And by "garbage", I mean key-value pairs that are not needed any more. I really don't want to clean the garbage "on the go/before persisting" because I don't want to let the user wait unnecessarily. The purpose of this garbage buildup is the benefit of more responsive app, at the cost of little more temporary storage. I need your advice on how to actually make it temporary. How would you clean up this garbage in such a way the user will not notice it? I have thought of two ways. Which would work? Which are impossible? Which is better? Do you recommend any others? 1. When the app is idle, keep selecting random employees to clean up key-value pairs within them. Stop this process as soon as the app is not idle any more. Over time, this will tend to keep the app "clean", and the user won't notice anything. How could I do this? How can I figure out whether an app is idle? Will Apple's "Treading Programming Guide" help me with it? 2. Judging from ONLY (yes, ONLY; do NOT break the NDA) the information already available on apple.com's GCD intro page and the nice PDF intro brochure they made for everyone, would I be able to create threads for this task, create MOCs for each of them, do the cleaning on those threads, and hand those threads to GCD? It sounds fancy and cool, but is this even a realistic solution? The problem I can think of is that when actually saving the "main MOC", the main MOC will still contain the garbage and wouldn't be able to figure out whether to persist the garbage or not. Finally, note that I cannot use willTurnIntoFault, and clean up the garbage there, because it is very inefficient in my case to do the clean up for the managed objects one by one. And again, the user would have to wait while saving, which is a bad solution. I really have to do them in batches, in such a way that the user will not notice it. --. _________________________________________________________________ With Windows Live, you can organize, edit, and share your photos. http://www.microsoft.com/middleeast/windows/windowslive/products/photo-gallery-edit.aspx_______________________________________________ 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
