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https://issues.apache.org/jira/browse/HIVE-11529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15853832#comment-15853832
]
Teddy Choi commented on HIVE-11529:
-----------------------------------
It brought up to 4x performance.
Before:
{noformat}
o.a.h.b.v.VectorizedLogicBench.IfExprLongColumnLongColumnBench.bench
avgt 2 2201086483.000 ± NaN ns/op
o.a.h.b.v.VectorizedLogicBench.IfExprLongColumnLongScalarBench.bench
avgt 2 1361940192.000 ± NaN ns/op
o.a.h.b.v.VectorizedLogicBench.IfExprLongColumnRepeatingLongColumnBench.bench
avgt 2 2965654720.500 ± NaN ns/op
o.a.h.b.v.VectorizedLogicBench.IfExprLongScalarLongColumnBench.bench
avgt 2 1252793715.000 ± NaN ns/op
o.a.h.b.v.VectorizedLogicBench.IfExprLongScalarLongScalarBench.bench
avgt 2 525885607.500 ± NaN ns/op
o.a.h.b.v.VectorizedLogicBench.IfExprLongScalarRepeatingLongColumnBench.bench
avgt 2 937117696.500 ± NaN ns/op
o.a.h.b.v.VectorizedLogicBench.IfExprRepeatingLongColumnLongColumnBench.bench
avgt 2 2970268531.500 ± NaN ns/op
o.a.h.b.v.VectorizedLogicBench.IfExprRepeatingLongColumnLongScalarBench.bench
avgt 2 1258292159.500 ± NaN ns/op
o.a.h.b.v.VectorizedLogicBench.IfExprRepeatingLongColumnRepeatingLongColumnBench.bench
avgt 2 2028832459.000 ± NaN ns/op
{noformat}
After:
{noformat}
o.a.h.b.v.VectorizedLogicBench.IfExprLongColumnLongColumnBench.bench
avgt 2 1905568359.500 ± NaN ns/op
o.a.h.b.v.VectorizedLogicBench.IfExprLongColumnLongScalarBench.bench
avgt 2 311806588.500 ± NaN ns/op V
o.a.h.b.v.VectorizedLogicBench.IfExprLongColumnRepeatingLongColumnBench.bench
avgt 2 2950095981.000 ± NaN ns/op
o.a.h.b.v.VectorizedLogicBench.IfExprLongScalarLongColumnBench.bench
avgt 2 309752757.500 ± NaN ns/op V
o.a.h.b.v.VectorizedLogicBench.IfExprLongScalarLongScalarBench.bench
avgt 2 227286994.000 ± NaN ns/op V
o.a.h.b.v.VectorizedLogicBench.IfExprLongScalarRepeatingLongColumnBench.bench
avgt 2 380720489.500 ± NaN ns/op V
o.a.h.b.v.VectorizedLogicBench.IfExprRepeatingLongColumnLongColumnBench.bench
avgt 2 2974550657.500 ± NaN ns/op
o.a.h.b.v.VectorizedLogicBench.IfExprRepeatingLongColumnLongScalarBench.bench
avgt 2 385519086.000 ± NaN ns/op V
o.a.h.b.v.VectorizedLogicBench.IfExprRepeatingLongColumnRepeatingLongColumnBench.bench
avgt 2 2079411174.500 ± NaN ns/op
{noformat}
> 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-11529.3.patch,
> HIVE-11529.4.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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