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[jira] [Created] (ARROW-2660) [Python] Experiment with zero-copy pickling

Antoine Pitrou created ARROW-2660:

             Summary: [Python] Experiment with zero-copy pickling
                 Key: ARROW-2660
                 URL: https://issues.apache.org/jira/browse/ARROW-2660
             Project: Apache Arrow
          Issue Type: Wish
          Components: Python
    Affects Versions: 0.9.0
            Reporter: Antoine Pitrou

PEP 574 has an implementation ready and a PyPI-available backport (at [https://pypi.org/project/pickle5/] ). Adding experimental support for it would allow for zero-copy pickling of Arrow arrays, columns, etc.

I think it mainly involves implementing {{reduce_ex}} on the {{Buffer}} class, as described in [https://www.python.org/dev/peps/pep-0574/#producer-api]

In addition, the consumer API added by PEP 574 could be used in Arrow's serialization array, to avoid or minimize copies when serializing foreign objects.

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