Perf improvement: OpenMapRealVector should iterate over smaller of two OMRVs,
and should call ArrayRealVector.getDataRef() when possible
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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
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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