Is there any speed difference with gentoo?

[snowsquirrel]

I have used gentoo on an x86 machine before and there was a noticeable speed difference. There are many variations of x86 cpu's thus the optimizations are beneficial.

But I am guessing that most sparc distro compiles with -mcpu=ultrasparc -O2 which as what I am using with gentoo.

Comments?

[bung-foo]

I actually use -Os rather then -O2 because I find that the sparc processors are plenty fast but the disc system in the ultra80 is old slow scsi--40mbs.

This is from the gcc manual:
-Os
Optimize for size. -Os enables all -O2 optimizations that do not typically increase code size. It also performs further optimizations designed to reduce code size.

-Os disables the following optimization flags:

-falign-functions -falign-jumps -falign-loops
-falign-labels -freorder-blocks -fprefetch-loop-arrays

Abe

[snowsquirrel]

Interesting. For biggies like Mozilla, Qt Designer/Assistant, Eclipse, etc, that could equal much better startup times.

Thanks for insight. Can I do an export CFLAGS='-Os -pipe -march=utlrasparc' before doing an emerge, or do I actually have to change it in the make.conf?

Thanks

[bung-foo]

Not sure. I just set it in make.conf


Abe