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From "Benjamin Jakobus (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-5018) Avoiding object instantiation in loops (issue 6)
Date Tue, 13 Aug 2013 15:51:50 GMT

     [ https://issues.apache.org/jira/browse/HIVE-5018?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Benjamin Jakobus updated HIVE-5018:
-----------------------------------

    Release Note: Minor performance improvements: I ran arithmetic operations on a small dataset
consisting of 30,000,000 records (standalone mode) and the patched version was 2.6% faster
than the unpatched version.
          Status: Patch Available  (was: Open)
    
> Avoiding object instantiation in loops (issue 6)
> ------------------------------------------------
>
>                 Key: HIVE-5018
>                 URL: https://issues.apache.org/jira/browse/HIVE-5018
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Benjamin Jakobus
>            Assignee: Benjamin Jakobus
>            Priority: Minor
>             Fix For: 0.12.0
>
>         Attachments: HIVE-5018.1.patch.txt
>
>
> Object instantiation inside loops is very expensive. Where possible, object references
should be created outside the loop so that they can be reused.

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