But I also see importance of ignoring score calculation. If you put it aside performance gain, is there any possibility to completely ignore scoring calculation?
Jelda > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf > Of Yonik Seeley > Sent: Wednesday, May 23, 2007 6:54 PM > To: java-user@lucene.apache.org > Subject: Re: How to avoid score calculation completely? > > On 5/23/07, Zhang, Lisheng <[EMAIL PROTECTED]> wrote: > > We have been using lucene for years and it serves us well. > > > > Sometimes when we issue a query, we only what to know how > many hits it > > leads, not want any docs back. Is it possible to completely avoid > > score calculation to get total count back? > > > > I understand score calculation needs a loop for all matched > docs, can > > we avoid the loop, surely this is for performance. We want > to achieve > > getting total count at O(1), independent of the number of Docs? > > Calculating scores adds a low, fixed amount of overhead to > the matching logic. > The savings would most likely not be that large. > > For simple queries, it might be quickest to use TermDocs() to > iterate over the docs matching terms yourself. > > Also, see Matcher in http://issues.apache.org/jira/browse/LUCENE-584 > > -Yonik > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
