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https://issues.apache.org/jira/browse/ARROW-8963?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17117571#comment-17117571
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yiming.xu commented on ARROW-8963:
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this is github pr link : https://github.com/apache/arrow/pull/7288
fix design: switch the resevre and set to void resevre to 2 * size
> Parquet cpp optimize allocate memory
> ------------------------------------
>
> Key: ARROW-8963
> URL: https://issues.apache.org/jira/browse/ARROW-8963
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Format
> Affects Versions: 0.17.1
> Reporter: yiming.xu
> Priority: Major
>
> LeafReader::NextBatch should Reset memory first, otherwise Reserve will
> allocate memory twice
> fix design: switch the resevre and set to void resevre to 2 * size
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