Robert Burke created BEAM-4726:
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             Summary: Reduce ParDo per element Invoke overhead
                 Key: BEAM-4726
                 URL: https://issues.apache.org/jira/browse/BEAM-4726
             Project: Beam
          Issue Type: Sub-task
          Components: sdk-go
            Reporter: Robert Burke
            Assignee: Robert Burke


Each call to invoke allocates a new args []interface{}, but the common case is 
to run the same ProcessElement function over and again. It should be possible 
to have a container struct to retain the args slice, and avoid recomputing the 
indices for where to assign parameters before calling the ProcessElementFn.



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