You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@mahout.apache.org by sr...@apache.org on 2010/04/02 21:25:39 UTC
svn commit: r930355 -
/lucene/mahout/trunk/math/src/main/java/org/apache/mahout/math/AbstractVector.java
Author: srowen
Date: Fri Apr 2 19:25:38 2010
New Revision: 930355
URL: http://svn.apache.org/viewvc?rev=930355&view=rev
Log:
Some hopefully innocuous optimizations that could help recommender job
Modified:
lucene/mahout/trunk/math/src/main/java/org/apache/mahout/math/AbstractVector.java
Modified: lucene/mahout/trunk/math/src/main/java/org/apache/mahout/math/AbstractVector.java
URL: http://svn.apache.org/viewvc/lucene/mahout/trunk/math/src/main/java/org/apache/mahout/math/AbstractVector.java?rev=930355&r1=930354&r2=930355&view=diff
==============================================================================
--- lucene/mahout/trunk/math/src/main/java/org/apache/mahout/math/AbstractVector.java (original)
+++ lucene/mahout/trunk/math/src/main/java/org/apache/mahout/math/AbstractVector.java Fri Apr 2 19:25:38 2010
@@ -110,6 +110,9 @@ public abstract class AbstractVector imp
}
public Vector divide(double x) {
+ if (x == 1.0) {
+ return clone();
+ }
Vector result = clone();
Iterator<Element> iter = result.iterateNonZero();
while (iter.hasNext()) {
@@ -314,6 +317,9 @@ public abstract class AbstractVector imp
}
public Vector plus(double x) {
+ if (x == 0.0) {
+ return clone();
+ }
Vector result = clone();
int size = result.size();
for (int i = 0; i < size; i++) {
@@ -355,6 +361,12 @@ public abstract class AbstractVector imp
}
public Vector times(double x) {
+ if (x == 1.0) {
+ return clone();
+ }
+ if (x == 0.0) {
+ return like();
+ }
Vector result = clone();
Iterator<Element> iter = result.iterateNonZero();
while (iter.hasNext()) {