Andreas Kaiser wrote:
>>
>>The benchmark scene uses a reasonable amount of CSG, a comparison with 
> 
> 
> I don't think so.
> Both of my private builds take about 38min for benchmark.pov (PIV
> 2.8GHz, 1GB RAM, options are -w384 -h384 +a0.3 +v -d -f -x).
> 
> Setting use_photons = use_area_light = show_clouds = show_objects to
> false				==> about 114sec both.
> Additionally remove the Sockets ==> about  79sec both.
> So as a rough estimate the intersection objects only take about 2% of
> the total time.

Which is exactly the case for an average 'real' scene (real meaning not 
a technical test scene but a true final scene for a real image).  I 
guess if you do a statistical analysis of some of the better POV-Ray 
generated IRTC submissions you will find this confirmed.  This is not 
the case for scenes that make heavy use of isosurfaces and other objects 
with expensive intersection tests.

I agree with Warp though that a weak performance in rendering 
benchmark.pov is not at all a reason not to integrate this improvement. 
  The patch you posted in p.b.p. will make it quite difficult though 
since you did not clearly mark your changes.

Christoph

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