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https://issues.apache.org/jira/browse/HIVE-11529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14991740#comment-14991740
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Teddy Choi commented on HIVE-11529:
-----------------------------------
The performance increase is not consistent. I will investigate deeper and
update this patch.
> Loop optimization for SIMD in IfExprLong*Long*
> ----------------------------------------------
>
> Key: HIVE-11529
> URL: https://issues.apache.org/jira/browse/HIVE-11529
> Project: Hive
> Issue Type: Sub-task
> Components: Vectorization
> Reporter: Teddy Choi
> Assignee: Teddy Choi
> Priority: Minor
> Attachments: HIVE-11529.2.patch, HIVE-11529.patch
>
>
> HIVE-10238 showed that ?: operator can be optimized with bitwise operators
> when it only handles LongColumnVectors. There are more similar cases as
> following.
> IfExprLongColumnLongScalar: {code}outputVector[i] = (vector1[i] == 1 ?
> vector2[i] : arg3Scalar);{code}
> IfExprLongScalarLongColumn: {code}outputVector[i] = (vector1[i] == 1 ?
> arg2Scalar : vector3[i]);{code}
> IfExprLongScalarLongScalar: {code}outputVector[i] = (vector1[i] == 1 ?
> arg2Scalar : arg3Scalar);{code}
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