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https://issues.apache.org/jira/browse/HIVE-22629?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17021648#comment-17021648
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Hive QA commented on HIVE-22629:
--------------------------------



Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12991472/HIVE-22629.3.patch

{color:red}ERROR:{color} -1 due to no test(s) being added or modified.

{color:green}SUCCESS:{color} +1 due to 17945 tests passed

Test results: 
https://builds.apache.org/job/PreCommit-HIVE-Build/20282/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/20282/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-20282/

Messages:
{noformat}
Executing org.apache.hive.ptest.execution.TestCheckPhase
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.YetusPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12991472 - PreCommit-HIVE-Build

> 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
>         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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