[Zope] Several questions on Z3 Views backported thru Five

[Manuel Vázquez Acosta]

Thanks for your response...

I will try that. I have already started to "clean" up the views and creating
a very simple custom caching mechanism to achieve better perfomance. We have
made some success, but we're still working.

Best regards,
Manuel.



Tres Seaver wrote:
> 
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> Manuel Vázquez Acosta wrote:
>> Hi all,
>> 
>> I've been asked to deploy a Plone App which must satisfy a load of at
>> least 1200
>> users over 8 min.
>> 
>> I have tested a fresh Plone 2.5.3 with Zope 2.9.7, plus Squid + CacheFu
>> and
>> everything went just fine. The laptop didn't even notice such a load.
>> 
>> But, when I installed the Plone App, even much smaller load didn't pass
>> the test.
>> 
>> Thus, I have to dig into the source code of the app to find the source of
>> the
>> problems. I have found that the app uses Z3 concepts, specially Views.
>> This
>> question poped into my mind:
>> 
>> 1. Does Zope2+Five creates Views everytime they are used, and discard
>> them
>> afterwards?
>> 
>> If this is the case, then maybe I should code a ViewFactory which caches
>> frequently used views. This may help.
> 
> Nope, that won't help, because views are bindings between context
> objects and requests.
> 
> The time required to create views / adapters is completely negligible
> compared to the time required to *render* the Plone main template.  You
> need to focus on stripping out features you don't need in that template,
> and / or caching fragments of it.
> 
> 
> Tres.
> - --
> ===================================================================
> Tres Seaver          +1 540-429-0999          tseaver at palladion.com
> Palladion Software   "Excellence by Design"    http://palladion.com
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