efficient memoize decorator?

[thattommyhallll@gmail.com]

am i correct in thinking that psyco will just not accelerate, rather
than break code it cannot deal with? that has been a pretty standard
import on all my programs
tom


Ziga Seilnacht wrote:

> thattommyhallll at gmail.com wrote:
> > im plugging away at the problems at
> > http://www.mathschallenge.net/index.php?section=project
> > im trying to use them as a motivator to get into advanced topics in
> > python.
> > one thing that Structure And Interpretation Of Computer Programs
> > teaches is that memoisation is good.
> > all of the memoize decorators at the python cookbook seem to make my
> > code slower.
> > is using a decorator a lazy and inefficient way of doing memoization?
> > can anyone point me to where would explain how to do it quickly. or is
> > my function at fault?
>
> Your problem is that you are mixing psyco and memoize decorators;
> psyco cannot accelerate inner functions that use nested scopes (see
> http://psyco.sourceforge.net/psycoguide/unsupported.html ).
> You could try using the memoize decorator from:
> http://wiki.python.org/moin/PythonDecoratorLibrary ,
> which doesn't use functions with closures, or use Fredrik Lundh's
> solution which puts memoization directly into the function.
> 
> Ziga