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https://issues.apache.org/jira/browse/HIVE-22629?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ashutosh Chauhan updated HIVE-22629:
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Fix Version/s: 4.0.0
Resolution: Fixed
Status: Resolved (was: Patch Available)
> AST Node Children can be quite expensive to build due to List resizing
> ----------------------------------------------------------------------
>
> Key: HIVE-22629
> URL: https://issues.apache.org/jira/browse/HIVE-22629
> Project: Hive
> Issue Type: Improvement
> Reporter: Slim Bouguerra
> Assignee: Slim Bouguerra
> Priority: Major
> Fix For: 4.0.0
>
> Attachments: HIVE-22629.1.patch, HIVE-22629.2.patch,
> HIVE-22629.3.patch, HIVE-22629.patch,
> noETLs_ETLs_profile-kc-hdp-mstr06-p.servicemanagement.com-interactive-166620-t-e-cpu-1576029590.svg
>
>
> As per the attached profile, The AST Node can be a major source of CPU and
> memory churn, due to the ArrayList resizing and copy.
> In my Opinion this can be amortized by providing the actual size.
> [~jcamachorodriguez] / [~vgarg]
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