Gentoo Archives: gentoo-performance

From: Florian Philipp <f.philipp@××××××.de>
To: gentoo-performance@l.g.o
Subject: Re: [gentoo-performance] Advice for CFLAGS
Date: Fri, 08 Jun 2007 09:29:08
In Reply to: Re: [gentoo-performance] Advice for CFLAGS by Daniel Armyr
Am Freitag 08 Juni 2007 07:35 schrieb Daniel Armyr:
> > Well, I suppose that's part of the problem. What does O3 improve? > > I cannot speak for the -03 from gcc specifically, but most > optimizations tend to increase the processes within the CPU. Further, > for them to help, the compiler tends to need to, at compile time, know > how the code will run. As such, it does almost nothing for event-driven > code like the entire X-windows system. Further, I would like to see the > linux computer today which has a processing problem when it comes to X. > The disk-access times to load binaries far overshadow anything > processor related in all computers I have seen. > > My suggestion to the general user: Get raided, super-fast scsi disks and > a mobo with low-latency memory if you want a truly fast computer.
In other words, there is no clear answer but my chances are quiet bad. I think I'll try around a bit. I'll prepare three images on my desktop, one Os, one O2 and one O3. Then I'll post my experience...


Subject Author
Re: [gentoo-performance] Advice for CFLAGS Mike Spitzer <mwspitzer@×××××.com>