[jira] [Created] (BEAM-1561) Iterating over _UnwindowedValues is slow

[Ahmet Altay (JIRA)]

Ahmet Altay created BEAM-1561:
---------------------------------

             Summary: Iterating over _UnwindowedValues is slow
                 Key: BEAM-1561
                 URL: https://issues.apache.org/jira/browse/BEAM-1561
             Project: Beam
          Issue Type: Bug
          Components: sdk-py
            Reporter: Ahmet Altay


User reported issue
"""
Iterating over it (multiple times) is very slow, which goes away after
converting it to a list via
  user_data = list(user_data)
"""



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