[Xapian-discuss] Xapian or Clucene for mobile device

[Martin Kuen]

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?)


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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