rvalue references

[Namespace via Digitalmars-d]

On Tuesday, 9 June 2015 at 11:04:43 UTC, Stewart Gordon wrote:
> Apologies if I've missed something - I haven't had much time to 
> keep up with the discussions lately.
>
> What is the use case for rvalue references in a 
> garbage-collected language?
>
> To me, it sounds like people want this feature for D purely 
> because C++ has it.
>
> Stewart.

What does this have to do with "garbage-collected language"?
If I have a big struct, e.g.
----
struct Matrix {
     float[16] values = [...];
}
----
I always want to pass it by ref because a move or a copy would be 
too slow.