Depends on your data. I know that's a vague answer but that's the point. What you could do is use FieldCache if memory and data let you do so. Would it?
-- Anshum Gupta http://ai-cafe.blogspot.com On Thu, Mar 10, 2011 at 3:12 PM, suman.holani <suman.hol...@zapak.co.in>wrote: > Hi Anshum, > > Thanks for prompt reply. > > I am only storing the fields in index , which I want to get/fetch after > search. > > The area I am not sure is when we call searcher/reader class to initialize > Document object is heavy? > Can we use something else in that place, which doesnot needs to load all > doc > again. > > Regards, > Suman > > > -----Original Message----- > From: Anshum [mailto:ansh...@gmail.com] > Sent: Thursday, March 10, 2011 3:11 PM > To: java-user@lucene.apache.org > Subject: Re: document object > > Hi Suman, > Do you need to load/use all fields that you have stored in the index? If > that's not the case I'd suggest you to use the > > > public Document > < > http://lucene.apache.org/java/3_0_1/api/core/org/apache/lucene/document/Doc > ument.html> > *doc*(int i, FieldSelector fieldSelector) > > > http://lucene.apache.org/java/3_0_1/api/core/org/apache/lucene/search/IndexS > earcher.html#doc(int, > org.apache.lucene.document.FieldSelector) > < > http://lucene.apache.org/java/3_0_1/api/core/org/apache/lucene/search/Index > Searcher.html#doc(int, > org.apache.lucene.document.FieldSelector)>function . > This should help you. Also, otherwise if you're using very selective field > which may be used though a FieldCache it'd be a nice thing to do. > > Hope that helps. > -- > Anshum Gupta > http://ai-cafe.blogspot.com > > > On Thu, Mar 10, 2011 at 3:01 PM, suman.holani > <suman.hol...@zapak.co.in>wrote: > > > > > > > Hi, > > > > > > > > I am facing the problem > > > > > > > > The line in the loop is going very slow giving me a performance hit > > > > for (int i = 0; i < hits.length; ++i) { > > > > > > > > int docId = hits[i].doc; > > > > Document d = searcher.doc(docId); //problem > > > > } > > > > > > > > How can I improve this. Please give me an example of the improved code > > > > > > > > Thanks, > > > > Suman > > > > > > > > > > > > Ps : > > > > In one of post Erick said .. > > > > > > > > this line is really suspicious: > > > > Document document = this.indexReader.document(doc) > > > > From the Javadoc for HitCollector.collect: > > > > Note: This is called in an inner search loop. For good search > performance, > > implementations of this method should not call > > > > > > Searcher.doc(int)<file:///C:/lucene-2.1.0/docs/api/org/apache/lucene/search/ > > Searcher.html#doc%28int%29>or > > > > > > IndexReader.document(int)<file:///C:/lucene-2.1.0/docs/api/org/apache/lucene > > /index/IndexReader.html#document%28int%29>on > > every document number encountered. Doing so can slow searches by an > > order > > of magnitude or more. > > > > > > > > > > > > > > > > > > > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > >
