| Altivec might have made a little difference:
this is compiled with altivec option, stock (uncommented)
code,
writing to disk
Elapsed time at end of performance: real: 54.744s, CPU:
43.510s
and not writing to disk
Elapsed time at end of performance: real: 43.822s, CPU:
35.000s
I did some comparisons with csound 4.23f12 using time
and performance seems comparable (although time is
not the best for benchmarking I suppose)
I have been using trapped as in CVS.
Victor
>
> Victor Lazzarini wrote:
>
> > >csound examples/trapped.csd -n
> >
> > Elapsed time at end of performance: real: 38.795s, CPU:
> > 29.340s
>
> This is now getting better. Did you disable messages with
> -d -m128 -H0, and did you use --expression-opt ?
>
> > Commenting out that bit does make a difference, but not
> > crucial; does it make a difference to have that bit of
> code ?
>
> It is needed for error handling. However, you may try
> replacing the call to csoundPerformKsmps with
> csoundPerformBuffer in frontends/csound/csound_main.c
> (assuming that you use the standard command line
> frontend): this way, setjmp() will be called only once per
> -b samples and not every ksmps samples. Of course for this
> to make difference, -b needs to be higher than ksmps.
>
> > Writing to disk seems to take a good chunk of processing
> > time though.
> > Can this be improved (again, not crucial for RT)?
>
> If you did not already try to set higher buffer sizes,
> then something like -b 1024 (or even higher, the default
> is 256) may improve disk rendering.
>
>
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