Re: [Modeling-users] Fetching raw rows

[Yannick G. <yan...@sa...>]

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On July 18, 2003 07:00 am, Sebastien Bigaret wrote:
>   Yes, thanks for pointing this out. This is documented there:
> http://psyco.sourceforge.net/psycoguide/metaclass.html
> http://psyco.sourceforge.net/psycoguide/node19.html#l2h-19
>
>   The nice thing here is that you do not even have to change your class
>   declaration, just add 'from psyco.classe import *'. I still have to
>   study the effect of changing to classes of the framework to new-style.
>
>   However a quick try with this enabled an EditingContext,
>   DatabaseContext and DatabaseChannel does not show any amelioration
>   (perf. are in fact slightly worse).

My experience with Psyco shows that the code optimization does not
always kick in on the 1st try.  Enabling Psyco in profiling mode (which
is unfortunately incompatible with the profiler in the standard
library) will generate code optimization here and there even a few
minutes after startup.

As usual, I never experienced the kind of performance boost reported
in the documentation.  40% faster max with OBB
(http://openbeatbox.org) but since most of the hard work (raster op.)=20
is already done in C++ (PyQt) it was expected.

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Yannick Gingras
Byte Gardener, Savoir-faire Linux inc.
(514) 276-5468

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