On Fri, 2004-02-13 at 17:32, Chris Cheney wrote: > On Fri, Feb 13, 2004 at 06:00:38PM -0500, C. Scott Ananian wrote: > > On Fri, 13 Feb 2004, Chris Cheney wrote: > > > > > I just did a simple speed test with oggenc 32bit vs 64bit under a 64bit > > > kernel to see what kind of speed increase we could see... I picked ogg > > > since I maintain it and its typically cpu bound. > > > > what compiler options were used/what optimization levels? > > --scott > > Default optimizations I just rebuilt the debian source without the extra > plugins that depended on KDE/NAS/XFree86. I am not sure what the source > itself does or if it has been optimized for amd64 yet. The Debian > packaging itself certainly doesn't do anything special. Which is as it should be: What matters is what i386's compile defaults are going to be, not the handful of per-x86-CPU-optimized packages (ala, kernel-image-CPU). Sure, the 32-bit + SSE version may be faster than the 64-bit + SSE version... but if Debian i386 has only the 386^H^H486 version (no SIMD optimizations, etc.), then the AMD64 version is gonna win on all but cache-intensive, non-FPU-bound apps. Admittedly, this probably includes a good many Unix system utilities, but since I'm an amd64 desktop user, I'm highly interested FPU optimization. -s
Attachment:
signature.asc
Description: This is a digitally signed message part