I don't normally use Psycho, and did not have it installed with my python2.4 installation. Whilst searching for something else however, I came across this simple language speed comparison: Ruby, Io, PHP, Python, Lua, Java, Haskell, and Plain C Fractal Benchmark by Erik Wrenholt and wondered...
So, twenty minutes later I had installed Psycho and with the addition of an inserted line three to Eriks Mandlebrot.py example of:
import psyco; psyco.full()
The run time went down from 4.6 to 1 second.
The exercise was really to remind me that Psycho is available.