Hi John,
thanks for sending me your file off-list. I have run it through a Java
profiler and have found that out of 180 seconds, 177 seconds are spent
in a Jena internal method called Unparser.findInfiniteCycles() which is
used by the RDF/XML abbrev writer to identify nodes that haven't been
reached yet. Maybe your RDF model really does include infinite cycles
and the system runs into worst case performance. In any case it's
something that is outside of our code base and if interested you would
need to follow up with the Jena developers.
However, you have a simple work-around in TopBraid Composer:
1) For everyday work, save your files to Turtle (takes 1 second)
2) If you need to generate an .rdf file, use File > Export >
Export/Merge/Convert RDF Graphs and select RDF/XML (without the abbrev!)
which also only takes a second.
HTH,
Holger
On 10/22/2012 8:55, John Perdoni wrote:
Hi Holger ,
thaks for the quick response, the version of tbc is Version:
3.6.1.v20120622-1546R , im stuck with .rdf extensions for the moment
so I dont think I have changed the ttl preferences. FYI they are
currently set at Jenas Turtle writer and Predicable(for Source Control)
Happy to send file off-;list , what topquadrant email address should I use
Thanks again
John
On Sunday, 21 October 2012 23:27:12 UTC+1, John Perdoni wrote:
Hi
Over a period of time, one file in my model has gradually but
surely increased the time it takes to save even the simplest of
changes. It is now up to around the 5 minute mark. I have checked
the triples view and apart from a few blank nodes referencing
rdf:List I cannot see anything untoward. I estimate the no of
triples to be below 5000 , (although any help on how I can
actually get a count would be usefull)
Ive tried inspecting the blank nodes(approx 50 with type rdf:list(
by drilling down on rdf:list in the resource Form view, but
cannot seem to find any other data .) Any directions on how to
query a blank node in tbc would also be extremely helpful, but not
priority)
The file size is 3,756,930 bytes so is not big
I cannot fathom out why this file is taking so long to save , any
pointers would be helpful
Regards
John
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