> They should, in theory, be faster than btrees -- O(1) not O(log N) page
> fetches per lookup.  In practice they don't seem to be faster, and
> nobody's bothered to find out exactly why.  Again, this isn't a terribly
> encouraging precedent for implementing some other index type that's
> supposed to (sometimes) be faster than btrees.

Yes, I understand. Which is also why I was curious to know if the "claims" 
those papers (and the databases using them) make were real...

Thank you everybody for your replies.

Leonardo


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