I didn't intend to imply otherwise but I see my wording was unclear. I meant that D generally would be a hit, though it's only really speculation either way.
There is no inherent reason that D code would be slower than C++ code.
I should know, I've written a C++ compiler and know where the bloat is buried, and designed D to eschew features that would be inherently slower than the C++ counterparts.
You can even turn off the runtime array bounds checking.
