std.algorithm.swap and memcpy

[Andrei Alexandrescu]

dsimcha wrote:
> I saw in the changelog that std.algorithm.swap now uses memcpy because it's
> faster than the old way.  Why is this?  If memcpy is faster, how come DMD
> doesn't generate the same instructions for normal assignment?

The problem was that the copy construction and assignment were 
previously used. Those could be intercepted and made arbitrarily costly.

Andrei