[mod_python] Newbie question: do I need to worry about compilation of modules served directly by mod_python

Ling Bao lingbao at swingvine.com
Sun Jul 27 05:13:21 EDT 2008

Thanks for addressing my question!  That was helpful.

On Sat, Jul 26, 2008 at 11:22 PM, Graham Dumpleton <
graham.dumpleton at gmail.com> wrote:

> 2008/7/25 Ling Bao <lingbao at swingvine.com>:
> > I'm a newbie to mod_python and the open source community in general.
>  Here's
> > what might seem like a stupid question, but please entertain me : )
> >
> > I'm building a site and serving its pages with mod_python out of a www
> > directory.  I have a bunch of .py files in the www directory for
> rendering
> > the home page, sign in page, etc.  Each of these modules also imports
> > packages and modules from other directories.
> >
> > In the other directories containing the imported modules, I see .pyc
> files.
> > However, in the www directory where the mod_python handler is picking up
> the
> > top-level scripts for handling requests, I don't see any pyc files.  I
> think
> > this is expected because python doesn't auto-compile py files unless
> they're
> > imported by some other module.
> A custom built module importer is used by mod_python, where for code
> files which are reloadable, no .pyc file is generated nor used if it
> existed previously.
> > My question is am I suffering any performance impact by letting
> mod_python
> > use py top-level scripts under the www directory instead of manually
> > compiling these scripts and having mod_python run the pyc files instead.
> No.
> > Or  is all this moot because mod_python does auto-reloading and keeps the
> > scripts under www in memory (unless the py files are modified in which
> case
> > a reload occurs)?
> Pretty well, that is the case.
> Note that in Python web application hosting, the network performance,
> whether Python optimisations is enabled, or whether .pyc files are
> used are never going to be the performance bottleneck, so I wouldn't
> particularly waste your time on it. Worry more about things like the
> performance of algorithms used by your application and database query
> performance.
> Graham
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