[modeless]

Are you confusing build time with performance of the resulting binary? I'm talking about the latter. Both are important and both are lacking with modern C++ in debug mode.

Edit: I see, I carelessly used the word "build" to mean a compiled binary, which was ambiguous. I've changed it.

[rmcclellan]

Thanks for the clarification. I guess like all trade-offs, it's context dependent. I see the advantages of having a realtime usable non-optimized build for debugging. Since I use modern libraries like Eigen, that option has not been available to me for some time.

With "modern" techniques, the performance ceiling is a bit higher - whether that benefit is worth it depends on a lot of factors.