[PD-dev] double precision Pd: .patch files, tests and benchmarks

IOhannes m zmoelnig zmoelnig at iem.at
Mon Oct 3 18:21:57 CEST 2011


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On 2011-10-03 18:04, katja wrote:
> On Mon, Oct 3, 2011 at 4:35 PM, Hans-Christoph Steiner <hans at at.or.at> wrote:
> 
>> Do you have access to an ARM
>> machine?  If not, I could probably get one online with ssh access, if that's
>> useful.
> 
> I've mailed Joe White with the question if he can patch the code for
> libpd and check performance on ARM. 

apropos performance:
on my i5 650 @ 3.2GHz, running debian
and trying to osc-delay-perfotest.pd (with only 400 osc-delay
abstractions, as 500 would max out the CPU in "new double" mode) i get:
original  : 28%
debian    : 31%
new single: 64%
new double: 86%

the "new" versions are Pd-0.43.1-test4 with only the PD_FLOAT_PRECISION
set to 32 resp. 64.

the "original" version is a 0.43.1-test2, where i cannot recall any
special optimization flags.

the "debian" version is a 0.43.0 with most optimization turned OFF (as
is debian policy)

fgmasdr
IOhannes
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