Kira Traynor created SOLR-16758:
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             Summary: GraphQuery Performing Slower in Solr 9
                 Key: SOLR-16758
                 URL: https://issues.apache.org/jira/browse/SOLR-16758
             Project: Solr
          Issue Type: Bug
      Security Level: Public (Default Security Level. Issues are Public)
            Reporter: Kira Traynor


We found that the changes made in SOLR-14185 with the GraphQuery slowed down 
the performance of the graph join by around 50%. Reverting the changes made in 
that pr to use a `Filter` object to get the `DocIdSet` rather than using a 
`DocIdSetIterator`, sped the query times up in our tests to be more similar to 
what we were seeing with the Solr 8 graph joins.

 

The same change was made to the JoinQuery class so possibly slower performance 
can be found there as well.



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