[jira] [Work logged] (BEAM-3981) Futurize and fix python 2 compatibility for coders package

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/BEAM-3981?focusedWorklogId=97618&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-97618 ]

ASF GitHub Bot logged work on BEAM-3981:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 02/May/18 18:05
            Start Date: 02/May/18 18:05
    Worklog Time Spent: 10m 
      Work Description: tvalentyn commented on issue #5053: [BEAM-3981] Futurize coders subpackage
URL: https://github.com/apache/beam/pull/5053#issuecomment-386068489
 
 
   Based on the information I currently have, my best guess is that regression is caused by changes in Cython's interpretation of Py3 implementations of range() and iteritems() in coder_impl.py. We can see a difference in code generated by Cython here:
   
   https://docs.google.com/document/d/1S-oeqJGiMHt_L3iCgr9dYfQdR0_ukQE25mcvK-BqudU/edit#heading=h.xkt18qn9ofn1
   
   I am seeing 7% regression in the median on the benchmarks I've been running, and I was able to see the regression go away with these changes reverted. 
   
   We can also try to benchmark these methods in isolation to confirm and rule out the variance of test setup. I might not have time to do it this week.
   
   @robertwb , do you  think anything can be done to improve Cython translation here?

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Issue Time Tracking
-------------------

    Worklog Id:     (was: 97618)
    Time Spent: 15.5h  (was: 15h 20m)

> Futurize and fix python 2 compatibility for coders package
> ----------------------------------------------------------
>
>                 Key: BEAM-3981
>                 URL: https://issues.apache.org/jira/browse/BEAM-3981
>             Project: Beam
>          Issue Type: Sub-task
>          Components: sdk-py-core
>            Reporter: Robbe
>            Assignee: Robbe
>            Priority: Major
>          Time Spent: 15.5h
>  Remaining Estimate: 0h
>
> Run automatic conversion with futurize tool on coders subpackage and fix python 2 compatibility. This prepares the subpackage for python 3 support.



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