On Tue, Aug 12, 2014, at 06:24 PM, Rick Mann wrote: > > On Aug 12, 2014, at 15:12 , Kyle Sluder <k...@ksluder.com> wrote: > > > On Tue, Aug 12, 2014, at 04:00 PM, Rick Mann wrote: > >> Hi. Is the timeout (the one that kills your app if the main run loop > >> blocks for too long) longer during app startup than after it's running? > >> I'm concerned about the Core Data migration my app does at startup. I > >> will eventually move it to work on a background thread, but I'd like to > >> punt that to the next release in the interests of time. > > > > Don't punt it. Do it now. > > > > Paul Goracke gave a very nice description of the death spiral that > > ensues if you try to perform a main-thread migration, especially at app > > launch: http://vimeo.com/89370886 > > Unless we can show that it Just Doesn't Work (which it does), I seriously > can't spend the time to do that right now.
Well in that case, be prepared for rejection from the App Store, or one-star reviews from your customers, when the watchdog repeatedly kills your app during launch. Obviously I don't know your app's architecture, but conceptually, even if you're using the thread-confinement model, you just need to throw up some form of modal UI while you perform the migration on a background thread. --Kyle Sluder _______________________________________________ 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
