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From "Uwe Schindler" <...@thetaphi.de>
Subject RE: Performance impact of searching across multiple fields
Date Tue, 28 Jul 2015 15:15:40 GMT
It depends on the number of fields. If you search on 3 fields it is not likely to be a problem
(the general use case 3 fields: plain, stemmed, folded). But if you have like 50 fields, the
slow down is likely very large!

-----
Uwe Schindler
H.-H.-Meier-Allee 63, D-28213 Bremen
http://www.thetaphi.de
eMail: uwe@thetaphi.de


> -----Original Message-----
> From: aurelien.mazoyer@francelabs.com
> [mailto:aurelien.mazoyer@francelabs.com]
> Sent: Tuesday, July 28, 2015 5:05 PM
> To: java-user@lucene.apache.org
> Subject: Performance impact of searching across multiple fields
> 
> Hi,
> 
> I am wondering about the real performance impact of searching across
> multiple fields instead of using a catch-all field. I know that Lucene is
> optimized to do that and that there are mechanisms to mitigate the
> overhead but does anybody know if  there are performance benchmarks
> related to this question?
> 
> Thanks,
> 
> Aurélien
> 
> 
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