Assuming gcc-3.4.0:

> -O3

        Correct,

> -DCPU=athlon

        not useful at all for the povray-3.50c Unix source,

> -march=athlon

        probably "-march=athlon-xp -mtune=athlon-xp" could be
more suited, and also maybe "-msse" and, as reported elsewhere,
"-mfpmath=sse,387" (but use this one with care).
 
> check out "-finline-functions"

        not useful since automatically turned on by -O3,

> "-funroll-loops"

        do _not_ use this one, as it will most likely make the
code slower,

> maybe more.

        eventually "-malign-double" "-minline-all-stringops" but there is
no evidence yet that they would actually improve efficiency.

        - NC

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