Re: Slow templates in py2exe

On Fri, Sep 18, 2009, R. Tyler Ballance wrote:
> On Thu, 17 Sep 2009, Aahz wrote:
>>> My initial instinct is that py2exe is pulling in the Python version of
>>> the NameMapper, which is indeed slower than the C version. The
>>> NameMapper is what is responsible for mapping $myVar into the actual
>>> entity that it represents.
>>> 
>>> Do you have the compiled version of NameMapper installed? Do you know if
>>> py2exe is pulling it in?
>> 
>> Curioser and curioser, as Alice said.  AFAICT, there isn't any
>> _namemapper.pyd anywhere on the system.  (There's a _namemapper.so on my
>> Mac.)  There doesn't seem to be an official pyd for 2.6, should I use
>> http://feisley.com/python/cheetah/pyd2.2.1/py26/_namemapper.pyd
>> ?
> 
> Perhaps if you asked James nicely enough he could post a build of 2.0.1
> on Windows, the downside of this of course is that prior to v2.2.2
> Cheetah was less-than-friendly in terms of building on Windows (which is
> why we actually had _namemapper.pyd files checked in.)

<shrug>  The 2.2.1 .pyd seems to work fine with 2.0.1 (I already tested
that before you responded because I was in a hurry); if we run into
problems, we'll probably just upgrade Cheetah.

(Just to be explicit, installing the .pyd did fix the performance
problems.)

>> Any clue why Cheetah is so fast outside the .EXE without any
>> _namemapper.pyd around?
> 
> The very nature of the NameMapper's function means it's going to call a
> lot of functions and iterate quite a bit through a few lists, IIRC the
> C version just cuts down a lot of overhead related to Python dynamic
> lookup and dispatch. I'm probably wrong about that though :)

Yeah, I know, I just can't figure out how it could possibly work so fast
using the .py outside the .EXE.  It's not worth chasing down, though.
(I did verify by doing a manual import that there isn't any
_namemapper.pyd around)

> p.s. mind me asking what you're shipping with Cheetah on Windows? :D

http://www.egnyte.com/ has a "local cloud client" that uses Cheetah on
CherryPy to run the UI.
-- 
Aahz ([email protected])           <*>         http://www.pythoncraft.com/

"I won't accept a model of the universe in which free will, omniscient
gods, and atheism are simultaneously true."  --M

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