Psyco on 64-bit machines

Diez B. Roggisch deets at
Sat Nov 14 19:15:41 CET 2009

Russ P. schrieb:
> 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.

Isn't the SUN Ultra using an ULTRA-Sparc core? If so, the point is moot.


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