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From Reto Bachmann-Gmür (JIRA) <>
Subject [jira] Commented: (CLEREZZA-194) Replace the integrated SPARQL engine
Date Mon, 26 Apr 2010 10:40:32 GMT


Reto Bachmann-Gmür commented on CLEREZZA-194:

It would be inetersting to have a comparison of the speed for a sparql query directly against
TDB and the same query using clerezza.

> Replace the integrated SPARQL engine
> ------------------------------------
>                 Key: CLEREZZA-194
>                 URL:
>             Project: Clerezza
>          Issue Type: Improvement
>            Reporter: Oliver Strässer
>            Priority: Critical
> The Scalability of the integrated SPARQL engine isn't very good.  Some test with big
graphs demonstrate this problem. 
> A Query over a big Graph (120 MB) needs more than 45 seconds with SPARQL. The same "query"
build with graph.filter(triple) calls, needs only 1-2 msec - quite faster. 
> research with Manuel Innerhofer shows, that the problem is the hasnext() method of the
SPARQL  resultset.

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