Bruce Dawson reveals this great feature. A year ago this would have been incredibly exciting to me. Even now it’s great news for native developers using Visual Studio:

It turns out that Microsoft shipped this feature in Visual Studio 2012, but forgot to tell anyone. This could be the most important improvement to Visual Studio in years but it s been almost top-secret.

Microsoft really should be shouting about this. Debugging Optimized Code – New in Visual Studio 2012.

What’s really amazing is that this isn’t considered a make-or-break product feature. IIRC Watcom C++ did this around 1996. Visual Studio survived. Watcom didn’t.