Suddenly, after opening my solution, the Visual Studio background process "Microsoft (R) Visual C++ Package Server" starts consuming all available resources, especially memory, leading to swapping and effectively grounding the system to a halt.
When killing the process, it immediately starts up again which allowed me to take this screenshot after it allocated nearly 3 GB of memory in about 2 seconds: http://i43.tinypic.com/14todc9.png
I tried deleting the .sdf, .suo and other generated files from the directory of the solution but that didn't help.
Edit: the problem appears with both Ultimate and Express editions of MSVC
Edit: I seem to have found a possible source for this problem.
Putting the following code from outside inside a class, it will cause the above symptoms: