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https://issues.apache.org/jira/browse/BEAM-2365?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16027013#comment-16027013
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ASF GitHub Bot commented on BEAM-2365:
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Github user asfgit closed the pull request at:
https://github.com/apache/beam/pull/3226
> Use highest protocol for pickle coder.
> --------------------------------------
>
> Key: BEAM-2365
> URL: https://issues.apache.org/jira/browse/BEAM-2365
> Project: Beam
> Issue Type: Bug
> Components: sdk-py
> Reporter: Robert Bradshaw
> Assignee: Robert Bradshaw
>
> E.g. for large NumPy arrays, this is a 3x reduction in size and a 61x
> reduction in cpu.
> Note that dill already does this (but the FastPrimitivesCoder intentionally
> uses cPickle instead).
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