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From "Hyunsik Choi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TAJO-119) Refactor and Improve Datum
Date Fri, 13 Sep 2013 09:50:56 GMT

    [ https://issues.apache.org/jira/browse/TAJO-119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13766363#comment-13766363
] 

Hyunsik Choi commented on TAJO-119:
-----------------------------------

+1

I've verified 'mvn clean install'. 

It's very interesting work. I definitely felt much performance benefits when Tajo performs
ETL work and queries on text-based data. I'm looking forward to seeing your benchmark result.
                
> Refactor and Improve Datum
> --------------------------
>
>                 Key: TAJO-119
>                 URL: https://issues.apache.org/jira/browse/TAJO-119
>             Project: Tajo
>          Issue Type: Improvement
>          Components: storage
>            Reporter: Jinho Kim
>            Assignee: Jinho Kim
>             Fix For: 0.2-incubating
>
>         Attachments: TAJO-119.patch
>
>
> A datum constructor called too many times. and there are so many overhead of converting
between a primitive and string
> * Change to lazy datum types
> * Improve memory efficiency
> * Improve text, number processing

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