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From "Benjamin Jakobus (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-5018) Avoiding object instantiation in loops (issue 6)
Date Thu, 05 Sep 2013 13:58:52 GMT

    [ https://issues.apache.org/jira/browse/HIVE-5018?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13759083#comment-13759083
] 

Benjamin Jakobus commented on HIVE-5018:
----------------------------------------

Here you go:

Avg. of 3 runs:

i < 90000000
in loop instantiation took 542 seconds
avoiding in loop instantiation took 525 seconds

                
> 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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