XCode 8 signing product

I've just updated to XCode 8, I'm working with a old project ( probably created in XCode 6 or earlier ) the problems is even in the simulator it stay stuck for at least half or one minute and the continues, with XCode 7 the launch the app in the device was really fast.


Is there any way to make this process faster?


Because XCode includes the new feauture to help you to manage signatures and I tried to deactivate this in: Automatically manage signing, I still have the same problem.


Any idea?


Thanks