Github user Ishiihara commented on a diff in the pull request:
https://github.com/apache/spark/pull/2815#discussion_r18917918
--- Diff: graphx/src/main/scala/org/apache/spark/graphx/Graph.scala ---
@@ -195,6 +195,12 @@ abstract class Graph[VD: ClassTag, ED: ClassTag]
protected () extends Serializab
* the underlying index structures can be reused.
*
* @param map the function from an edge object to a new edge value.
+ * @param mapUsesSrcAttr indicates whether the source vertex attribute
should be included in
+ * the triplet. Setting this to false can improve performance if the
source vertex attribute
+ * is not needed.
+ * @param mapUsesSrcAttr indicates whether the destination vertex
attribute should be included in
--- End diff --
mapUsesSrcAttr -> mapUsesDstAttr
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