[GEM-dev] Why is [hsv2rgb] implemented as an abstraction?

[IOhannes m zmoelnig]

Claude Heiland-Allen wrote:
> Hi all,
> 
> Just wondering why hsv2rgb.pd (which is pretty incomprehensible) isn't a 
> compiled external.  I had to write a C implementation because the Pd 
> implementation was too slow.  Some rough benchmarks:
> 
> CPU: 1.6GHz Pentium-M
> Patch: rather complex, with 25*1024 calls to hsv2rgb per second.
> CPU-load as reported by load-meter.pd:
>    hsv2rgb.pd     : 108%
>    fast_hsv2rgb.c :  94%
> 
> Quite a difference.

honestly i think that the difference is way less than i would have 
expected it.
it means that a super-fast implementation in C using the latest compiler 
optimization and whatelse is only about 14% faster than a whole punch of 
indirection and overhead induced by pd's message parsing....


fgmasdr.
IOhannes