[Zope] Re: Several questions on Z3 Views backported thru Five

[Tres Seaver]

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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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