I occasionally rewrite Python+NumPy signal processing code in C++ for purposes of packaging and integration with native apps, so I read these examples with an eye to how they compare with typical C++, rather than with NumPy. They compare very well, and it would never have occurred to me to look into D as a possibility for this sort of code.

I'm guessing the GC might rule it out for many cases where you do signal processing in C++, but I may as well ask: what's the deployment side of things like? Can I easily build a shared library and use it from a C++ application?