I noticed that when I make a change to my code and build for debug, only my code gets recompiled. But when I build for Distribution, either for the App Store or for Ad Hoc distribution, the entire 800+ files in the Offical Objective C Dropbox Library gets recompiled. It is not too much of a bother since I don't build for distribution that often, but it does take almost a minute on my Mac Mini, whereas by app alone takes only a few seconds. I am using CoCo Pods to handle the Obj-C library, according to the Dropbox installation instructions.