I experience the same problem... debugging (even starting an app via debugger) on a physical device is incredibly slow for months. Since this "other" thread is locked I wanted to post my latest experience here: although my iOS devices are connected via cable to my Mac, I just by "accident" disabled on my iOS device's active Wifi settings the "private Wifi address" switch and all from a sudden debugging and all stuff runs fast again. Even after turning the private wifi address switch back on again, it's still fast to deploy and debug from Xcode (via cable). Perhaps this can be a workaround for someone else as well...

I have the same issue... debugged half the day to find out: rotation is NOT working on iPhone OS, although methods like shouldAutorotate or supportedInterfaceOrientations are called when running with the debugger (but e.g. viewWillTransitionToSize never gets called afterwards) rotation for the same project IS working when running in the simulator rotation IS working on iPad when running with the debugger rotation IS working on physical device when starting the app without Xcode rotation IS working for a newly created simple iOS App with just a "Hello"-Screen while running in the debugger Our project uses a GLKViewController subclass as main entry point