Hive QA commented on HIVE-22726:

Here are the results of testing the latest attachment:

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

{color:green}SUCCESS:{color} +1 due to 17876 tests passed

Test results: 
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/20185/console
Test logs:

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

This message is automatically generated.

ATTACHMENT ID: 12990883 - PreCommit-HIVE-Build

> TopN Key optimizer should use array instead of priority queue
> -------------------------------------------------------------
>                 Key: HIVE-22726
>                 URL: https://issues.apache.org/jira/browse/HIVE-22726
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>            Reporter: Attila Magyar
>            Assignee: Attila Magyar
>            Priority: Major
>             Fix For: 4.0.0
>         Attachments: HIVE-22726.1.patch
> The TopN key optimizer currently uses a priority queue for keeping track of 
> the largest/smallest rows. Its max size is the same as the user specified 
> limit. This should be replaced a more cache line friendly array with a small 
> (128) maximum size and see how much performance is gained.

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