Old microsoft video with lots of detail about design of MSVC's PGO#2

There's an old hour long Microsoft video that has interviews with different MSVC compiler backend engineers, that goes into lots of detail about how MSVC's PGO works that's probably worth including somewhere on the page. [GoingNative 12: C++ at Build 2012, Inside Profile Guided Optimization](https://learn.microsoft.com/en-us/shows/c9-goingnative/c9goingnative-12-c-build-2012-inside-profile-guided-optimization).