[mythtv-users] 32 vs. 64 bit, any significant difference?

Rod Smith mythtv at rodsbooks.com
Fri Dec 18 04:43:18 UTC 2009

On Thursday 17 December 2009 03:10:54 pm Robin Hill wrote:
> On Thu Dec 17, 2009 at 08:31:59PM +0100, belcampo wrote:
> >
> > Are there any hard facts that prove these assumptions ?
> > Transcoding 32 vs 64bit 512MB vs 2-8GB
> There's some transcoding figures at:
> http://hans.fugal.net/blog/2008/04/20/64-bit-transcoding/
> Not transcoding, but there's some comparisons of other operations at:
> http://tuxradar.com/content/ubuntu-904-32-bit-vs-64-bit-benchmarks
> AMD have some a good general comparison at:
> http://forums.amd.com/devblog/blogpost.cfm?threadid=93648&catid=317

FWIW, I wrote a fairly early review (in 2004!) of the AMD64 architecture under 
Linux, with benchmarks:


I didn't include any video transcoding tests, but using oggenc to encode audio 
took 70% of the time to run on 64-bit as on 32-bit.

Of course, modern computers and software are substantially different from 
those of five years ago, but the x86 vs. x86-64 (aka AMD64) architectures are 
fundamentally the same.

Rod Smith

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