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