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From aurelien.mazo...@francelabs.com
Subject RE: Performance impact of searching across multiple fields
Date Tue, 28 Jul 2015 16:26:53 GMT
Hi,

Thank you for your answer. Is it something that is somehow theoretically 
quantifiable, or the only way to quantify the overhead is to prototype 
and to benchmark?

Regards,

Aurelien

On 28.07.2015 17:15, Uwe Schindler wrote:
> 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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> 
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