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https://issues.apache.org/jira/browse/ARROW-1816?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16257181#comment-16257181
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Wes McKinney commented on ARROW-1816:
-------------------------------------
I think the issue here is to avoid branching at the array cell for Java. If
there is a switch branch at the hot path for accessing values, then the JIT may
generate worse code
> [Java] Resolve new vector classes structure for timestamp, date and maybe
> interval
> ----------------------------------------------------------------------------------
>
> Key: ARROW-1816
> URL: https://issues.apache.org/jira/browse/ARROW-1816
> Project: Apache Arrow
> Issue Type: Sub-task
> Reporter: Li Jin
> Fix For: 0.8.0
>
>
> Personally I think having 8 vector classes for timestamps is not great. This
> is discussed at some point during the PR:
> https://github.com/apache/arrow/pull/1203#discussion_r145241388
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