[Zope-dev] Re: Caching ZCatalog results

[Roché Compaan]

On Fri, 2007-02-23 at 06:55 -0500, Tres Seaver wrote:
> Roché Compaan wrote:
> > I'm curious, has anybody played around with the idea of caching ZCatalog
> > results and if I submitted a patch to do this would it be excepted?
> > 
> > I quickly coded some basic caching of results on a volatile attribute
> > and I was really surprised with the amount of cache hits I got
> > (especially with a Plone site that is a heavy user of the catalog)
> 
> +1.  I think using the 'ZCachable' stuff (e.g., adding a RAMCacheManager
> and associating a catalog to it) would be the sanest path here.

Cool idea. I haven't done any coding involving OFS.Cache though. Looking
at it briefly it looks like one can modify the catalog to subclass
OFS.Cacheable and then use the ZCacheable_get, ZCacheable_set and
ZCacheable_invalidate methods to interact with a cache manager. This
needs to be pretty explicit though. Are there any side effects that I
should guard against if the catalog subclasses OFS.Cache?

-- 
Roché Compaan
Upfront Systems                   http://www.upfrontsystems.co.za