Optimized distro for i686

[Jason Carson]

> On 12/30/05, Steve <bassix-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org> wrote:
>> On 12/30/05, paul sutton <zen14920-1HOZaDBbGgxaa/9Udqfwiw at public.gmane.org> wrote:
>> > You can recompile .src.rpm packatges for a specific processor,  I
>> would
>> > guess that to optimise FC4 for i686 you could perhaps recompile all
>> the
>> > packages,  and burn these on to a cdrom along with modified
>> installation
>> > routines,  which would give you a new cd that is optimised for that
>> > specific processor.
>> >
>> > Ok there is more to it than that, but I have managed to recompile one
>> or
>> > two packages for optimisation (from i386 to i586 I think) and then
>> > instaled these with no problem.
>> >
>> > it can take a while to do this to lots of packages,  I would be a good
>> > idea to perhaps do this at a time when you can leave the computer on
>> for
>> > a few hours I would guess you need ALL packages installed so you can
>> > avoid problems with dependancies, while compiling.
>> >
>> > any comments
>> >
>> > Paul
>>
>> Is this pretty much what Gentoo does? So probably the Fox distro
>> people have done these recompiles and therefore will save people the
>> time required to do it themselves.
>
> This is pretty much what Gentoo does.
>
> The trouble is that sometimes bugs emerge when you use unusual
> compiler options; figuring out what flags are safe is something of a
> package-by-package thing.  Universally applying all the same compiler
> options everywhere doesn't work.

I use the following compiler options on Gentoo and everything works fine

CFLAGS="-O3 -march=athlon-xp -pipe -funroll-loops -fomit-frame-pointer
-m3dnow -mmmx -msse"


> It's not at all obvious that the result will actually be meaningfully
> faster.  For instance, database apps tend to have disk I/O as their
> bottleneck, and changing compiler options can't change that.
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