i am currently using Xcode 7.1.1, but this has been a problem for me going back to Xcode 6.
I am using Perforce as my SCM, so all project files are locked (read-only). Whenever I try to open any locked file, Xcode will hang (with a wait cursor) for over a minute. If I remember to check out the file before attempting to open it in Xcode, all is well.
Any one have any ideas as to what might be going on and/or how I can fix this?
Bruce