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Posted to issues@beam.apache.org by "Udi Meiri (Jira)" <ji...@apache.org> on 2020/03/11 22:36:00 UTC

[jira] [Created] (BEAM-9489) python typehints: reduce the number of runtime-type-check wrappers

Udi Meiri created BEAM-9489:
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             Summary: python typehints: reduce the number of runtime-type-check wrappers
                 Key: BEAM-9489
                 URL: https://issues.apache.org/jira/browse/BEAM-9489
             Project: Beam
          Issue Type: Bug
          Components: sdk-py-core
            Reporter: Udi Meiri


The --runtime_type_check flag is considered to be a performance penalty.
One of the possible slowdowns is the wrapper around DoFn.process(), which adds an extra call to the wrapped process() method.
Currently, there are 2 wrappers applied: OutputCheckWrapperDoFn and TypeCheckWrapperDoFn. These could be merged into one to possibly save on overhead. 



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