Opossum is the fastest OWL-S matchmaker in the 3rd International Semantic Service Selection Contest, having the best query response time with regards to the seven contest entries. As far as I know, this is the only benchmark for semantic Web services matchmaking, which makes Opossum the fastest in the world! More about the indexing technology that made Opossum fast can be found in this article (PDF).
Matchmakers were tested for speed and accuracy,and while Opossum had won the speed category, it is not one of the three top matchmakers for accuracy. Well, maybe next time
. I will add a link to the results summary when it becomes available.

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