I have a solution with 7 or 8 projects, none of which contain anything particularly exciting and all perform as well as you would expect (and indeed as well as other projects I have used on my current machine).
However, whenever I open either one of the AutoMapper MappingConfiguration files, Visual Studio grinds to halt, moving the cursor one space takes minutes at a time and trying to write code results in lots of swearing - lots and lots and lots of swearing.
It seems to only be this
I have simmilar problem in my solution. By using ADK i found reason in my case. Resharper get all cpu perfomance. Point by point i exclude some features from it, and in result find decision.
Turn Off Resharper IntelliSense, allow work Visual Studio native IntelliSense.
Resharper menu -> Option -> Environment -> IntelliSense -> General
Set radio to Visual Studio.
After work with Autommaper CS file, i turn it back.
No idea what the matter of this, but i`m guess it Automapper new reflection engine, after update Automapper from 3.1.1 version i got this problem.
But now my CPU on 3-5% level.