I do not know how to profile on GAE.
There are some things to consider:
0) make sure you use the provided gaehandler.py
1) you get the benefit of chaching bytecode compiler models and
actions only if the page if accessed often
2) you will get a speed up if you use memcache session instead of
datastore based sessions (the default)
3) Use
if request.function in ['one','two','three']:....
to conditionally execute code in models so that you do not define
tables that your actions do not need
4) Avoid too many {{ }} in templates.
5) Use memcache as much as you can.
Massimo
On Apr 14, 2:38 pm, Ted G <tedg...@gmail.com> wrote:
> I'm wondering if anyone has tips on where I should start in trying to
> track down performance problems running my web2py application on GAE.
> Initially I created an application using only the api's supplied by
> GAE. This app was very fast in terms of response times.
>
> I've since recreated and updated the app within web2py and have been
> frustrated with very poor performance. I experience long delays when
> loading pages and in particular, when loading pages that contain small
> images (where the image source is using web2py's download() handler to
> retrieve an image stored in the db as a web2py upload field).
>
> As mentioned, my previous GAE API version of the app also stored these
> same images as blobs in the db, but experienced none of the
> performance issues I see under web2py.
>
> Due to the delay experienced loading pages, my first thought, after
> reading threads in this group, was that maybe my code was being
> recompiled on every request. I updated to 1.61 this morning in the
> hope that the GAE cache issue it was addressing would solve my problem
> - but running a side to side comparison between a 1.59 version and
> 1.61 on GAE I did not see any difference.
>
> Any tips on how I can narrow down the source of the performance
> problems would be greatly appreciated.
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