[Xapian-discuss] Xapian or Clucene for mobile device

[Yannick Warnier]

Le dimanche 16 décembre 2007 à 21:13 +0100, Martin Kuen a écrit :
> Hi,
> 
> > I do not want you to get bored with more information and statistics,
> > but you can continue the research in case I missed something, cheers!
> 
> Could you probably bore me? I would be very interested in this topic, so:
> What kind of queries? (query length, "bag of words" or usage of
> boolean operators, etc)
> What kind of document corpus? (size, content-type)
> Did you use "of-the-shelf" installations of lucene, xapian, mysql? (or
> did you do some configuration?)

I would like to add on that request for more details. Has this
information been made public on a website or something, so it can
benefit to the whole community?
Because obviously "much better quality of results", as such, is a bit
subjective... (not that I am doubting your opinion, but I'd like to be
able to re-use that argument to convince my own public)

Yannick


> Hope to hear from you soon,
> 
> Martin
> 
> 
> 
> On Dec 14, 2007 9:45 AM, Kevin Duraj <kevin.softdev at gmail.com> wrote:
> > Sun Jianhong,
> >
> > I have done lot of research and performance and quality searches
> > between MySQL 5 Full-Text, MS SQL 2005 Full-Text, Lucene and Xapian.
> > All my performance and quality measurements showed to be Xapian the
> > fastest in indexing and searching. On my surprise I found Lucene to be
> > the slowest search engine and having the poorest quality results, but
> > having the largest community compare to MySQL 5 Full-Text, MS SQL 2005
> > and Xapian.
> >
> > WHY? (let's investigate closer)
> >
> > Performance:
> > - Lucene uses compound file format by default. Xapian and others used
> > B-Tree by default. Building and searching the compound file format
> > takes more time than building B-Tree. Therefore Lucene, Clucene etc.
> > indexing and searching is many times slower than indexing and
> > searching the same amount of data using Xapian.
> >
> > Quality of searches:
> > - Lecene uses Levenstein distance between two string instead of Xapian
> > using BM25 matching documents according to their relevance to a given
> > search query and returns much better quality of results than
> > Levenstein distance algorithm.
> >
> 
> > __________________________________
> >   Kevin Duraj
> >   http://UncensoredWebSearch.com
> >
> >
> >
> >
> > On Oct 19, 2007 12:40 AM, Sun Jianhong-a18232 <a18232 at motorola.com> wrote:
> > > Hi, All,
> > >
> > > Now we are investigating a open search engine for mobile device. Both
> > > Xapian and Clucene are c++ open search engine. From the performance
> > > perspective, which one is better for mobile device? Do you have some
> > > performance data between Xapian and Clucene?
> > >
> > > For mobile device, we do care about RAM comsuption, search and index
> > > performance, library size, etc. Can Xapian be easy to tailor for mobile
> > > device?
> > >
> > > Thank you very much !
> > >
> > > Regards,
> > > Sun Jianhong
> > > _______________________________________________
> > > Xapian-discuss mailing list
> > > Xapian-discuss at lists.xapian.org
> > > http://lists.xapian.org/mailman/listinfo/xapian-discuss
> > >
> >
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> >
> 
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