Psyco on 64-bit machines

[Russ P.]

I have a Python program that runs too slow for some inputs. I would
like to speed it up without rewriting any code. Psyco seemed like
exactly what I need, until I saw that it only works on a 32-bit
architecture. I work in an environment of Sun Ultras that are all 64-
bit. However, the Psyco docs say this:

"Psyco does not support the 64-bit x86 architecture, unless you have a
Python compiled in 32-bit compatibility mode."

Would it make sense to compile Python in the 32-bit compatibility mode
so I can use Psyco? What would I lose in that mode, if anything?
Thanks.