Polyhedron performance regression

[Dominique Dhumieres]

> I could imagine that on a PowerPC

Yes (I think Intel requires 10.4).

My understanding of the ac test is that a significant fraction of
cpu time may be eaten by the random number generator based on mod.
I got the impression that the gain done by inlining the proc is
to avoid a non necessary repetition of a division at each call
and have a new random number with only a muladd. I have a variant
doing this kind of optimization and is about twice as fast as
the old ac version (25s compared to 40s on OSX, no gain on Linux/AMD).

Dominique