On 6/9/06, Peter Keegan <[EMAIL PROTECTED]> wrote:
However, my throughput testing shows that the Solr method is at least 50%
faster than mine. I'm seeing a big win with the use of the HashDocSet for
lower hit counts. On my 64-bit platform, a MAX_SIZE value of 10K-20K seems
to provide optimal performance.

Interesting... how many documents are in your collection?
It would prob be nice to make the HashDocSet cutt-off dynamic rather than fixed.
Are you using Solr, or just some of it's code?

 I'm looking forward to trying this with
OpenBitSet.

I checked in the OpenBitSet changes today.  I imagine this will lower
the optimal max HashDocSet size for performance a little.  You might
not see much performance improvement if most of the intersections
involved a HashDocSet... the OpenBitSet improvements only kick in with
bitset<->bitset intersection counts.

-Yonik
http://incubator.apache.org/solr Solr, the open-source Lucene search server

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