Whatever you discover please let us know. It will help us improve.
Massimo
On Apr 14, 8:26 pm, Ted G <tedg...@gmail.com> wrote:
> Thank you for the tips. I'll work through these and determine if I can
> find a specific root cause of the performance problem.
>
> I've been testing on a particular page of the application that lists a
> number of items along with thumbnail images for those items. The
> thumbnails are images placed into an upload field of the item record
> and then displayed within the page using the following as the image
> src:
>
> {{ =URL(r=request,f='download',args=[channel.image]) }}
>
> The page itself takes a while to initially respond, and then each
> thumbnail in turn takes a while to download.
>
> As a test, I replaced the above image src with the following:
>
> /img/channel?id={{ =channel.id }}
>
> and used App.yaml to direct the /img to a request handler using GAE's
> native wsgihandler where I perform the following to download the
> thumbnail image instead of using the web2py download():
>
> record = channel.get_by_id(int(self.request.get
> ('id')))
> self.response.headers['Content-Type'] = contenttype
> (record.image)
> self.response.out.write(record.image_data)
>
> While the delay before the page first loads has not changed, the
> subsequent display of the thumbnails on the page is now very fast
> (which are the only requests now not being handled by web2py).
>
> Not sure what to make of this at this point, but I wanted to first
> ensure there was not a GAE or DB issue before digging deeper into what
> part of my web2py implementation is slowing things down.
>
> I have not modified the gaehandler.py and as a first step did move
> sessions to ram cache instead of db, but have not seen any noticeable
> performance increase.
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