Profile compilation of C++ code looking for compiler bottlenecks

[LADSoft]

It was suggested in #358 that we profile the compiler while it is compiling complex C++ code involving templates and so forth.

This is a separate issue to keep track of that so it isn't lost in the shuffle.

One thing Alexandre Bencz suggested might be a good thing to test in #358:

https://github.com/emweb/wt

This project take a lot of time to build with gcc/msvc++, this is a complex project