i did that about a year ago -- p9 and linux on identical hardware.  i
think i did post the results here..  i still have kept a powerpoint
presentation that should have them mentioned too, i can put it
somewhere on the web if you want..

in short, p9 was lagging insignificantly (something like 2 seconds out
of 60) for pov-ray image rendering (no IO)..  for dna sequence matching (fasta
algorithm) it was slower, but i contribute that to the overall
unoptimized IO of the system (i may be wrong)...

compile time was hands down a p9 win...

andrey

ps: it is possible to set-up a p9/linux shootout here, but i'm not
sure whether we may do so :)