"Compiling Please Wait" for over 10 seconds.

After changing even one line of C# code in MonoDevelop, it takes Unity about 10 seconds to recompile my project. I understand that this is probably normal because the project is pretty large at this point. So, my questions are:

1) Is it possible to find which files take most time to compile?

2) Is there a way to speed up the compilation process by making Unity compile only the files that change since the last compile or by any other methods short of buying a new computer?