Semantic Search - Faceted Search and Web 3.0 for Drupal

When dynamically generating SPARQL for SESAME - I seemed to have gained .5 second by adding filters to the end of the statement. Is SPARQL executed in SESAME in a way that this would make sense?

See the discussion at : http://www.openrdf.org/forum/mvnforum/viewthread?thread=1430