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From Reto Bachmann-Gmür (JIRA) <>
Subject [jira] Closed: (CLEREZZA-194) Replace the integrated SPARQL engine
Date Mon, 05 Jul 2010 14:31:51 GMT


Reto Bachmann-Gmür closed CLEREZZA-194.

      Assignee: Reto Bachmann-Gmür
    Resolution: Won't Fix

While a Fastlane might improve perfoamce, no sparql engine is known that is likely to be faster
than arq

> Replace the integrated SPARQL engine
> ------------------------------------
>                 Key: CLEREZZA-194
>                 URL:
>             Project: Clerezza
>          Issue Type: Improvement
>            Reporter: Oliver Strässer
>            Assignee: Reto Bachmann-Gmür
>            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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