Unfortunately Psyco is 32-bit only and not being actively developed (http://psyco.sourceforge.net/psycoguide/req.html http://psyco.sourceforge.net/psycoguide/re

Unfortunately Psyco is 32-bit only and not being actively developed (http://psyco.sourceforge.net/psycoguide/req.html http://psyco.sourceforge.net/psycoguide/req.html). On the plus side, the author is now focusing on PyPy.