__builtin_memcpy() slower than memcpy/bcopy (and on linux it is the opposite) ?

[Artem Belevich]

On Wed, Jan 23, 2013 at 8:32 AM, Luigi Rizzo <rizzo at iet.unipi.it> wrote:
> Probably our compiler folks have some ideas on this...
>
> When doing netmap i found that on FreeBSD memcpy/bcopy was expensive,
> __builtin_memcpy() was even worse, and so i ended up writing
> my custom routine, (called pkt_copy() in the program below).
> This happens with gcc 4.2.1, clang, gcc 4.6.4

The program does not seem to have pkt_copy. It does have fast_bcopy.
Is that the one you meant by pkt_copy?

--Artem