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Re: Debian vs Gentoo versatility (NOT PERFORMANCE)



On Sun, 18 May 2003 22:29:59 -0400
David Z Maze <dmaze@debian.org> wrote:

> In my experience, OpenGL performance is all about hardware
> acceleration: either you have it, in which case you get sane frame
> rates, or you don't, in which case no amount of compiler optimization
> will save you.

Well, benchmarks show that optimization makes it faster. Indeed it won't
make your system faster. But hey, systems run code; and code can be optimized.
Hardware doesn't do things magically.

Unoptimization creates bottlenecks; it doesn't makes hardware slower.


> Can you quantify this?  Conventional wisdom is that processor-specific
> optimizations only really matter for things that really truly are
> computationally intensive; this would include the software-only
> rendering example, and it includes crypto libraries, but it doesn't
> really include things like your random GNOME application.  If you have
> actual numbers on how much faster doing things with a
> processor-specific libc vs. a generic libc is, that might be
> interesting.

Are you doubting i can't show numbers where compiling libc for i386 sucks against a optimized one?


This:
http://lists.debian.org/debian-devel/2003/debian-devel-200304/msg02134.html
(yeah, it's crypto as you said)
shows how much optimization can matter. Do you doubt that libc (a performance-critical
library) won't be faster? 
X, GTK; a lot of apps are dynamically linked against libc. It matters.






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