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From "Matthias Boehm (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (SYSTEMML-1791) Performance features frame blocks
Date Fri, 21 Jul 2017 00:13:00 GMT

     [ https://issues.apache.org/jira/browse/SYSTEMML-1791?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Matthias Boehm resolved SYSTEMML-1791.
--------------------------------------
       Resolution: Done
         Assignee: Matthias Boehm
    Fix Version/s: SystemML 1.0

> Performance features frame blocks
> ---------------------------------
>
>                 Key: SYSTEMML-1791
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-1791
>             Project: SystemML
>          Issue Type: Task
>            Reporter: Matthias Boehm
>            Assignee: Matthias Boehm
>             Fix For: SystemML 1.0
>
>
> Recent experiments have shown that there are unnecessary overheads in various frame block
operations. This task is an umbrella for all related performance improvements. In detail,
this includes:
> * Shallow copy for column indexing
> * Bidirectional reuse of recode maps in meta data frames
> * Avoid unnecessary long-string-double parsing on transformapply



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