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From "Benjamin Jakobus (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-5194) Replace vectors with array lists (issue 6)
Date Mon, 02 Sep 2013 11:03:53 GMT

     [ https://issues.apache.org/jira/browse/HIVE-5194?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Benjamin Jakobus updated HIVE-5194:
-----------------------------------

    Assignee: Benjamin Jakobus
    
> Replace vectors with array lists (issue 6)
> ------------------------------------------
>
>                 Key: HIVE-5194
>                 URL: https://issues.apache.org/jira/browse/HIVE-5194
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Benjamin Jakobus
>            Assignee: Benjamin Jakobus
>             Fix For: 0.12.0
>
>
> Replace vectors with array lists- Vectors synchronized, making them slower than array
lists. Therefore using vectors in circumstances where thread-safety is not an issue will decrease
performance. I wrote some tests that added 9,999,999 integers to a vector: this took 2367
milliseconds. Adding them to an array list on the other hand took only 934 milliseconds.
> 6 instances of this optimization can be applied.

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