[Zope] ZCatalog Strategy

[Chris Withers]

Mark Gibson wrote:
> Does the cost of calling getObject() for a dozen objects justify 
> creating a new metadata field?

No.

> More generally how does a large amount of metadata in the catalog affect 
> performance of queries?

Badly ;-)

> The wisdom of those more knowledgeable than me would be appreciated.

As a rule of thumb, if you need a catalog search to return more than 
10-20 objects and you need to do something with an attribute of all the 
objects returned, then whack it in the metadata. If you only need it for 
the 10-20 objects, then do getObject and get the attribute from the object.

cheers,

Chris

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