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https://issues.apache.org/jira/browse/HIVE-11457?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gopal V updated HIVE-11457:
---------------------------
Attachment: HIVE-11457.1.patch
Reattach for tests.
> Vectorization: Improve SIMD JIT in GenVectorCode StringExpr instrinsics
> ------------------------------------------------------------------------
>
> Key: HIVE-11457
> URL: https://issues.apache.org/jira/browse/HIVE-11457
> Project: Hive
> Issue Type: Improvement
> Components: Vectorization
> Affects Versions: 2.0.0
> Reporter: Gopal V
> Assignee: Gopal V
> Fix For: 2.0.0
>
> Attachments: HIVE-11457.1.patch, HIVE-11457.1.patch,
> string-intrinsic-sse.png
>
>
> With HIVE-11406, the Vectorization codegen generates a new and specialized
> fast-path for equality (and non equality), which removed the ordering and
> comparison constraints in the old codepath.
> The equality operation can be much more pipeline and cache line efficient by
> keeping on comparing even when an inequality has been detected.
> Optimize the single loop into a pair of loops, to allow the Vectorization
> codegen to use tighter loops that the JIT superword optimization can
> understand.
> !string-intrinsic-sse.png!
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