[Zope] Faster ZCatalog Searches (better? Optimized?)

Now that one of my ZUBB boards is over 5,000 messages I am noticing where some of the slowdowns are. In my tests I have found that it is the <dtml-in statement and cycle that is bogging things down. In taking a look at Zope.org search through their ZCatalog they use a different code: ZUBB: <dtml-in "searchResults(in_reply_to=[''])" size=batch_size reverse sort=id start=query_start> Zope.org: <!--#with "_(results = doCatalogQuery(textindex_operator='and',REQUEST=REQUEST))"--> Is one better than the other? Is there something else that could be slowing down these searches? Thanks, BZ