Charles Chen created BEAM-3645:
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             Summary: Support multi-process execution on the FnApiRunner
                 Key: BEAM-3645
                 URL: https://issues.apache.org/jira/browse/BEAM-3645
             Project: Beam
          Issue Type: Improvement
          Components: sdk-py-core
    Affects Versions: 2.2.0, 2.3.0
            Reporter: Charles Chen
            Assignee: Charles Chen


https://issues.apache.org/jira/browse/BEAM-3644 gave us a 15x performance gain 
over the previous DirectRunner.  We can do even better in multi-core 
environments by supporting multi-process execution in the FnApiRunner, to scale 
past Python GIL limitations.



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