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https://issues.apache.org/jira/browse/PARQUET-7?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14040552#comment-14040552
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Dmitriy V. Ryaboy commented on PARQUET-7:
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That rabbit hole went deep, and undoing the protocol stacking (if indeed it's a
problem) would be a huge undertaking.
In the meantime, I created a small patch to address the case of thrift objects
where no fields are required.
https://github.com/apache/incubator-parquet-mr/pull/7
> [parquet-thrift] improve performance of thrift push-down code
> -------------------------------------------------------------
>
> Key: PARQUET-7
> URL: https://issues.apache.org/jira/browse/PARQUET-7
> Project: Parquet
> Issue Type: Wish
> Reporter: Dmitriy V. Ryaboy
>
> A user reported seeing slowness when projection push-down code is active,
> which seems to stem from ProtocolEventsAmender.
> Details can be found in https://github.com/Parquet/parquet-mr/issues/406
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