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From Oliver Strässer (JIRA) <j...@apache.org>
Subject [jira] Created: (CLEREZZA-194) Replace the integrated SPARQL engine
Date Wed, 21 Apr 2010 09:08:50 GMT
Replace the integrated SPARQL engine
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                 Key: CLEREZZA-194
                 URL: https://issues.apache.org/jira/browse/CLEREZZA-194
             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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