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From "Sean Busbey (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-8379) NanoTimeUtils performs some work needlessly
Date Tue, 07 Oct 2014 16:57:34 GMT

    [ https://issues.apache.org/jira/browse/HIVE-8379?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14162114#comment-14162114
] 

Sean Busbey commented on HIVE-8379:
-----------------------------------

Can we get a JVM microbenchmark to ensure the jit isn't already taking care of this for us?
(since those are all constants)

> NanoTimeUtils performs some work needlessly
> -------------------------------------------
>
>                 Key: HIVE-8379
>                 URL: https://issues.apache.org/jira/browse/HIVE-8379
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Brock Noland
>            Priority: Minor
>
> Portions of the math done with the constants can be pre-computed:
> https://github.com/apache/hive/blob/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/parquet/timestamp/NanoTimeUtils.java#L70



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