Andreas Kaiser wrote:
> Next try.
> 
> 
> The version below isn't as fast as my C++ version as it doesn't use a
> BBOX tree for the inverted children. Timing values for a level 4
> menger sponge are:
> 
> Original Version: 2207 seconds
> this C Version:    523 seconds
> my C++ Version:     35 seconds

Well, that's much worse, why didn't you convert the original version as 
it was?  It is surely not C++ being faster that leads to this difference...

> benchmark.pov, rendered with -w384 -h384 +a0.3 +v -d -f -x
> 
> Original Version: 5987 seconds
> this C Version:   4280 seconds

Seems about as i'd expect it.

Christoph

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