Re: two more architectures?
On Sunday 27 October 2002 16:16, Colin Watson wrote:
> On Sun, Oct 27, 2002 at 07:43:02PM -0400, Oleg wrote:
> > Colin Watson wrote:
> > > You get most of the speed increases by recompiling a very small number
> > > of things.
> >
> > This is true for applications in the following wording "you get most
> > of the speed increase by optimizing small parts of the program". For
> > something like Debian however, you can't possibly know in advance
> > where the users' bottleneck will happen to be. BTW, Gentoo users say
> > their systems "feel" a lot faster overall.
>
> That's probably because they're using gcc 3.2 and ELF prelinking already
> (at a guess). This is coming to Debian, but requires more transitional
> work.
>
> Anyway, "feel" doesn't wash. Every time this comes up the answer is to
> request a real benchmark: to my knowledge the only time someone's ever
> provided one is in the case of openssl, which nowadays in unstable has
> versions optimized for a number of processes.
>
You also have to find out what options they compiled with and against what
libraries. Debian may link in more functionality or use a slighlty less
optimized (for CPU anyway) version.
I have also seen that Mandrake (and perhaps others) use the optimized glibc we
used to ship. We found it to cause stability problems.
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