Hi Pantelis,

I guess there is a typo in your report , where you say "Jena was about 14
seconds faster than StAX based on 32 successive measurements that are
presented in the following figure", but on the figure response times using
Jena (red line) are higher than StAX.

Also, the statement "It was shown that StAX outperforms the internal
implementation of Jena for parsing RDF documents" is not entirely correct,
as currently StAX is used for writing (serializing), not for parsing RDF
documents.

Finally, as we discussed off-list, would be good to split the response time
into a download time and RDF parse time.

Best regards,
Nina

On Mon, Oct 4, 2010 at 6:12 PM, chung <chvng at mail.ntua.gr> wrote:

> Hi Christoph,
>   What is dimension (number of features and compounds) in this dataset?
> By the way, I have made some more measurements that you will find
> attached.
>
> Best regards,
> Pantelis
>
> On Mon, 2010-10-04 at 10:21 +0200, Christoph Helma wrote:
>
> > Dear all,
> >
> > I have just returned from holidays. In the attachment I am sending you a
> > few benchmarks for OWL-DL serialisation for various libraries (RDF.rb,
> > Redland with Ruby bindings, Redland with SWIG/Ruby bindings, direct
> > serialisation to strings (ntriples)) I have made before our meeting.
> > All of them use some internal housekeeping to avoid duplicate triples
> > (Triples creation ...). Algorithms are not 100% comparable (Objects are
> > sometimes created during triple creation, sometimes during triples
> > insertiion), but in general the bottleneck is the creation of the RDF
> > graph (Triples insertion into model ...). Serialisation itself is rarely
> > a problem (also not parsing).
> >
> > For future experiments I would suggest to share some benchmark datasets
> > (large, medium, small) - I will still have to read all the
> > messages/attachments of this thread in detail.
> >
> > Best regards,
> > Christoph
> > _______________________________________________
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> > Development at opentox.org
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>
>
>
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