Save just a little time where we can.

2012-05-09 20:24:39 +00:00
parent 19853300b7
commit 5218ec8afc
1 changed files with 3 additions and 1 deletions
@@ -306,7 +306,9 @@ CoverTree<MetricType, RootPointPolicy, StatisticType>::CoverTree(
  // because all the points in the near set should be used up.
  farSetSize = childFarSetSize;

-  ComputeDistances(pointIndex, indices, distances, farSetSize);
+  // No need to rebuild the distances if we never modified them.
+  if (nearSet.n_elem != 0)
+    ComputeDistances(pointIndex, indices, distances, farSetSize);
 }

 template<typename MetricType, typename RootPointPolicy, typename StatisticType>