Author: erans
Date: Wed Jul 20 22:09:17 2011
New Revision: 1148952
URL: http://svn.apache.org/viewvc?rev=1148952&view=rev
Log:
MATH-623
Slightly faster "add" method (due to Arne Plöse).
Modified:
commons/proper/math/trunk/src/main/java/org/apache/commons/math/linear/ArrayRealVector.java
Modified:
commons/proper/math/trunk/src/main/java/org/apache/commons/math/linear/ArrayRealVector.java
URL:
http://svn.apache.org/viewvc/commons/proper/math/trunk/src/main/java/org/apache/commons/math/linear/ArrayRealVector.java?rev=1148952&r1=1148951&r2=1148952&view=diff
==============================================================================
---
commons/proper/math/trunk/src/main/java/org/apache/commons/math/linear/ArrayRealVector.java
(original)
+++
commons/proper/math/trunk/src/main/java/org/apache/commons/math/linear/ArrayRealVector.java
Wed Jul 20 22:09:17 2011
@@ -304,12 +304,14 @@ public class ArrayRealVector extends Abs
/** {@inheritDoc} */
@Override
public RealVector add(double[] v) {
- checkVectorDimensions(v.length);
- double[] out = data.clone();
- for (int i = 0; i < data.length; i++) {
- out[i] += v[i];
+ final int dim = v.length;
+ checkVectorDimensions(dim);
+ ArrayRealVector result = new ArrayRealVector(dim);
+ double[] resultData = result.data;
+ for (int i = 0; i < dim; i++) {
+ resultData[i] = data[i] + v[i];
}
- return new ArrayRealVector(out, false);
+ return result;
}
/**
