mahout-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Robin Anil (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAHOUT-300) Solve performance issues with Vector Implementations
Date Mon, 22 Feb 2010 16:00:27 GMT

     [ https://issues.apache.org/jira/browse/MAHOUT-300?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robin Anil updated MAHOUT-300:
------------------------------

    Attachment: MAHOUT-300.patch

> Solve performance issues with Vector Implementations
> ----------------------------------------------------
>
>                 Key: MAHOUT-300
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-300
>             Project: Mahout
>          Issue Type: Improvement
>    Affects Versions: 0.3
>            Reporter: Robin Anil
>             Fix For: 0.3
>
>         Attachments: MAHOUT-300.patch, MAHOUT-300.patch, MAHOUT-300.patch, MAHOUT-300.patch,
MAHOUT-300.patch, MAHOUT-300.patch, MAHOUT-300.patch, MAHOUT-300.patch, MAHOUT-300.patch
>
>
> AbstractVector operations like times
>   public Vector times(double x) {
>     Vector result = clone();
>     Iterator<Element> iter = iterateNonZero();
>     while (iter.hasNext()) {
>       Element element = iter.next();
>       int index = element.index();
>       result.setQuick(index, element.get() * x);
>     }
>     return result;
>   }
> should be implemented as follows
>  public Vector times(double x) {
>     Vector result = clone();
>     Iterator<Element> iter = result.iterateNonZero();
>     while (iter.hasNext()) {
>       Element element = iter.next();
>       element.set(element.get() * x);
>     }
>     return result;
>   }

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message