On Tue, Sep 28, 2010 at 8:14 PM, Li Li <[email protected]> wrote: > I think current implmetation is slow. because it do collapse in all > the hit docs. In my view, it will take more than 1s when using > collapse and only 200ms-300ms when not in our environment. So we > modify it as -- when user need top 100 docs, we collect top 200 docs > and do collapse within these 200 docs.
Yep, like faceting, there's no one algorithm thats fast for all types of distributions. If you expect groups to be relatively unique, the most efficient way is just for the client to over-request a bit and do the collapse themselves. We'll be adding more implementations as time goes on of course, but I think tackling something first that the client *couldn't* easily do was a good choice. -Yonik http://lucenerevolution.org Lucene/Solr Conference, Boston Oct 7-8 --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
