Re: [Rdfapi-php-interest] SparqlEngineDb benchmark results

[Richard C. <ri...@cy...>]

Christian,

On 2 Jul 2007, at 08:51, Christian Weiske wrote:
> I made some benchmarks comparing RAP's new SparqlEngineDb against =20
> competitors like ARC, Jena and Redland.
> Results can be seen at
> http://cweiske.de/tagebuch/SPARQLer's%20best%20choice:%=20
> 20SparqlEngineDb.htm

Interesting. The benchmark seems to be designed to investigate how =20
the different implementations compare in terms of query parsing and =20
result processing overhead, and the new engine seems to do very well =20
in this regard. It would be very interesting to have some benchmarks =20
that show end-to-end performance for the kind of queries often used =20
in applications, e.g.

- datasets beyond 200k triples,
- queries that don't have a LIMIT 10 clause,
- queries that combine a small LIMIT lause with an ORDER BY and =20
possibly OFFSET (typical for web applications where results are paged),

And, also very important, though these queries are not data independent:

- queries that have more than two triple patterns,
- queries with at least one known node (e.g. a given URI as the ?s)

Some more notes: The page should mention which versions of the =20
different libraries were used, and which kind of machine this was run =20=

on. I also wondered what the unit of the y axis on the charts is. =20
Also, which Jena component was tested, the ModelRDB included with =20
Jena [1] (as implied by the link to the Jena homepage), or the alpha =20
SDB [2] (as stated further down on the page)?

Cheers,
Richard

[1] http://jena.sourceforge.net/DB/index.html
[2] http://jenawiki.hpl.hp.com/wiki/SDB


>
> --=20
> Mit freundlichen Gr=FC=DFen/Regards,
> Christian Weiske
>
> ----------------------------------------------------------------------=20=

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