Re: Slow templates in py2exe

On Thu, 17 Sep 2009, Aahz wrote:

> Cheetah 2.0.1, Python 2.6, CherryPy 3.1.1

Old Cheetah is Old ;)

(current is v2.2.2)

> I'm having a weird problem where Cheetah templates on Windows XP (and
> probably Vista, but haven't tested yet) are more than a hundred times
> slower inside an app built with py2exe.  This slowdown is not observed
> with either raw or compiled templates run from outside the build, and Mac
> built with py2app also works fine.
> 
> Any clues?  Ideas for places to look?

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?

> 
> Yes, literally more than a hundred times slower; a page that takes less
> than a second to display outside the build can take several minutes
> inside the .EXE, with CPU pegged at 100%.  I have verified with logging
> statements that it's TMPL.respond() that's the problem.  The problem is
> linear on the size of the generated output (i.e. a for loop with more
> iterations takes longer).


Cheers

-R. Tyler Ballance
Slide, Inc.

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