Old problem with performance

[Kagamin]

Weed Wrote:

> > Well, D class code here is not equivalent to C++ class code. D code has more features, namely, it's polymorphic: C.opAdd is able to work with classes, derived from C, while corresponding C++ code is unable to do so.
> 
> It is really true?

Of course.

> There opAdd is only for demonstration.

If your example has nothing in common with real-world tasks and needs, it's useless.