[arch-general] ?rch x86_64 and i686 performance comparison

[Andreas Radke]

Am Wed, 11 Nov 2009 17:44:53 +0100
schrieb Dieter Plaetinck <dieter at plaetinck.be>:

> On Wed, 11 Nov 2009 17:18:12 +0100
> Sven-Hendrik Haase <sh at lutzhaase.com> wrote:
> 
> > You will probably see the
> > opposite of what you saw in the VMs. Especially for video encoding,
> > x86_64 will be noticeably faster.
> 
> why is that?
> 

should be because of SSE+SSE2 extensions that are included in our
default compiler flags that are not used in i686.

-Andy