Marshall Schor created UIMA-4356:
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             Summary: Simplify iterators over types and subtypes by omitting 
empty subtypes
                 Key: UIMA-4356
                 URL: https://issues.apache.org/jira/browse/UIMA-4356
             Project: UIMA
          Issue Type: Improvement
            Reporter: Marshall Schor
            Assignee: Marshall Schor
            Priority: Minor
             Fix For: 2.7.1SDK


Iterators over types and their subtypes currently assemble together multiple 
iterators, one for each type/subtype, and iterate them together.  For cases 
where there are potentially 100's or 1000's of subtypes, most of which are 
"empty", this overhead can be reduced by skipping at iterator creation time the 
empty ones.  



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