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

[BZ]

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