My results from running 32/64 rendering to disk:

sr=44100
ksmps=1
nchnls=2

csound32:
Elapsed time at end of performance: real: 483.722s, CPU: 411.420s

csound64:
Elapsed time at end of performance: real: 481.068s, CPU: 431.810s


The difference of 20 seconds is not so bad for this piece I think.  I
tried rendering to dac with ksmps=16 and noticed some breakups in 64
that aren't there in 32, but I actually may be more prone to use 64
for dac and disk for smaller pieces now that I've done this test.  But
for the pieces with larger number of instruments, I am still planning
to use 32 for dac and 64 for disk as just the little bit helps.

BTW: I am on a Thinkpad T42 Laptop with PIII-M 1.7ghz, 1 gig ram.

steven



On 11/8/05, Steven Yi <stevenyi@gmail.com> wrote:
> Well, it probably wouldn't be that useful as different parts of the
> piece are more dense than others and they already max out my CPU in
> realtime with ksmps=1 using 32 bit.  So it'd just bee 100% for both.
> =)
>
> steven
>
> On 11/8/05, Iain Duncan <iainduncan@telus.net> wrote:
> >
> > > I will try a test tonight of my current piece I am working on.  The
> > > piece does not use convolution, and when rendering to disk I use
> > > 44100, 16bit, ksmps=1.  I will record the time taken to render the
> > > piece for both 64 and 32.  The piece is only a sketch but is ten
> > > minutes in duration with a fair amount going on, so should be a decent
> > > test I think.
> > >
> > > steven
> >
> > Steven, could you also if possible do a realtime output cpu use
> > comparison? I would be interested to hear the difference.
> >
> > Thanks
> > Iain
> >
> >
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