commons-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jake Mannix (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MATH-317) Perf improvement: OpenMapRealVector should iterate over smaller of two OMRVs, and should call ArrayRealVector.getDataRef() when possible
Date Mon, 02 Nov 2009 20:40:59 GMT

     [ https://issues.apache.org/jira/browse/MATH-317?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jake Mannix updated MATH-317:
-----------------------------

    Attachment: MATH-317.patch

Unit tests all pass, and as with MATH-316, this is an internal performance-only fix, so no
new unit tests are added.

> Perf improvement: OpenMapRealVector should iterate over smaller of two OMRVs, and should
call ArrayRealVector.getDataRef() when possible
> ----------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: MATH-317
>                 URL: https://issues.apache.org/jira/browse/MATH-317
>             Project: Commons Math
>          Issue Type: Improvement
>    Affects Versions: 2.0
>         Environment: all
>            Reporter: Jake Mannix
>            Priority: Minor
>             Fix For: 2.1
>
>         Attachments: MATH-317.patch
>
>
> In RealVector methods which take other RealVector parameters, OpenMapRealVector should
check to see which vector has more entries, and iterate over the smaller of the two, when
possible.  When the other vector is an ArrayRealVector, it should be explicitly cast to this,
and getDataRef() should be called, to avoid an unnecessary and possibly large array copy.

-- 
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