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