diff --git a/graph/src/main/scala/spark/graph/Analytics.scala b/graph/src/main/scala/spark/graph/Analytics.scala
index 5b0e5221ba..5c16ba8175 100644
--- a/graph/src/main/scala/spark/graph/Analytics.scala
+++ b/graph/src/main/scala/spark/graph/Analytics.scala
@@ -2,25 +2,9 @@ package spark.graph
 
 import spark._
 import spark.SparkContext._
-// import com.esotericsoftware.kryo._
 
 // import breeze.linalg._
 
-
-
-// class AnalyticsKryoRegistrator extends KryoRegistrator {
-//   def registerClasses(kryo: Kryo) {
-//     println("registering kryo")
-//     kryo.register(classOf[(Int,Float,Float)])
-//     Graph.kryoRegister[(Int,Float,Float), Float](kryo)
-//     Graph.kryoRegister[(Int,Float), Float](kryo)
-//     Graph.kryoRegister[Int, Float](kryo)
-//     Graph.kryoRegister[Float, Float](kryo)
-//     kryo.setReferences(false);
-//   }
-// }
-
-
 object Analytics {
 
 
@@ -111,14 +95,6 @@ object Analytics {
       gatherDirection = EdgeDirection.In)
   }
 
-
-
-
-
-
-
-
-
   // /**
   //  * Compute the connected component membership of each vertex
   //  * and return an RDD with the vertex value containing the
@@ -250,9 +226,6 @@ object Analytics {
     // //System.setProperty("spark.shuffle.compress", "false")
     // System.setProperty("spark.kryo.registrator", "spark.graphlab.AnalyticsKryoRegistrator")
 
-
-
-
     taskType match {
       case "pagerank" => {
 
diff --git a/graph/src/main/scala/spark/graph/Graph.scala b/graph/src/main/scala/spark/graph/Graph.scala
index 1b1929cc26..7b1111ae77 100644
--- a/graph/src/main/scala/spark/graph/Graph.scala
+++ b/graph/src/main/scala/spark/graph/Graph.scala
@@ -43,12 +43,6 @@ class EdgeWithVertices[@specialized(Char, Int, Boolean, Byte, Long, Float, Doubl
 }
 
 
-private[graph]
-case class MutableTuple2[@specialized(Char, Int, Boolean, Byte, Long, Float, Double) U,
-                         @specialized(Char, Int, Boolean, Byte, Long, Float, Double) V](
-  var _1: U, var _2: V)
-
-
 /**
  * A Graph RDD that supports computation on graphs.
  */
@@ -61,26 +55,23 @@ class Graph[VD: ClassManifest, ED: ClassManifest] protected (
   _rawETable: RDD[(Pid, EdgePartition[ED])]) {
 
   def this(vertices: RDD[Vertex[VD]], edges: RDD[Edge[ED]]) = {
-    this(
-      Graph.DEFAULT_NUM_VERTEX_PARTITIONS, Graph.DEFAULT_NUM_EDGE_PARTITIONS,
-      vertices, edges,
-      null, null)
+    this(vertices.partitions.size, edges.partitions.size, vertices, edges, null, null)
   }
 
   def withPartitioner(numVertexPartitions: Int, numEdgePartitions: Int): Graph[VD, ED] = {
     if (_cached) {
-      val newgraph = new Graph(numVertexPartitions, numEdgePartitions, null, null, _rawVTable, _rawETable)
-      newgraph.cache()
+      (new Graph(numVertexPartitions, numEdgePartitions, null, null, _rawVTable, _rawETable))
+        .cache()
     } else {
       new Graph(numVertexPartitions, numEdgePartitions, _rawVertices, _rawEdges, null, null)
     }
   }
 
-  def withVertexPartitioner(numVertexPartitions: Int = Graph.DEFAULT_NUM_VERTEX_PARTITIONS) = {
+  def withVertexPartitioner(numVertexPartitions: Int) = {
     withPartitioner(numVertexPartitions, numEdgePartitions)
   }
 
-  def withEdgePartitioner(numEdgePartitions: Int = Graph.DEFAULT_NUM_EDGE_PARTITIONS) = {
+  def withEdgePartitioner(numEdgePartitions: Int) = {
     withPartitioner(numVertexPartitions, numEdgePartitions)
   }
 
@@ -139,11 +130,11 @@ class Graph[VD: ClassManifest, ED: ClassManifest] protected (
       edgeDirection)
   }
 
-  def mapVertices[VD2: ClassManifest](f: (Vertex[VD]) => Vertex[VD2]): Graph[VD2, ED] = {
+  def mapVertices[VD2: ClassManifest](f: Vertex[VD] => Vertex[VD2]): Graph[VD2, ED] = {
     newGraph(vertices.map(f), edges)
   }
 
-  def mapEdges[ED2: ClassManifest](f: (Edge[ED]) => Edge[ED2]): Graph[VD, ED2] = {
+  def mapEdges[ED2: ClassManifest](f: Edge[ED] => Edge[ED2]): Graph[VD, ED2] = {
     newGraph(vertices, edges.map(f))
   }
 
@@ -237,7 +228,7 @@ class Graph[VD: ClassManifest, ED: ClassManifest] protected (
               }
           }
         }
-        vmap.int2ObjectEntrySet().fastIterator().filter{!_.getValue()._2.isEmpty}.map{ entry =>
+        vmap.int2ObjectEntrySet().fastIterator().filter(!_.getValue()._2.isEmpty).map{ entry =>
           (entry.getIntKey(), entry.getValue()._2)
         }
       }
@@ -316,14 +307,10 @@ class Graph[VD: ClassManifest, ED: ClassManifest] protected (
 
 object Graph {
 
-  val DEFAULT_NUM_VERTEX_PARTITIONS = 5
-  val DEFAULT_NUM_EDGE_PARTITIONS = 5
-
   /**
    * Load an edge list from file initializing the Graph RDD
    */
-  def textFile[ED: ClassManifest](sc: SparkContext,
-    fname: String, edgeParser: Array[String] => ED ) = {
+  def textFile[ED: ClassManifest](sc: SparkContext, fname: String, edgeParser: Array[String] => ED) = {
 
     // Parse the edge data table
     val edges = sc.textFile(fname).map { line =>
diff --git a/graph/src/main/scala/spark/graph/GraphKryoRegistrator.scala b/graph/src/main/scala/spark/graph/GraphKryoRegistrator.scala
index e72e500fb8..e1cb77f114 100644
--- a/graph/src/main/scala/spark/graph/GraphKryoRegistrator.scala
+++ b/graph/src/main/scala/spark/graph/GraphKryoRegistrator.scala
@@ -8,21 +8,17 @@ import spark.KryoRegistrator
 class GraphKryoRegistrator extends KryoRegistrator {
 
   def registerClasses(kryo: Kryo) {
-    kryo.register(classOf[(Int, Float, Float)])
-    registerClass[(Int, Float, Float), Float](kryo)
-    registerClass[(Int, Float), Float](kryo)
-    registerClass[Int, Float](kryo)
-    registerClass[Float, Float](kryo)
+    //kryo.register(classOf[(Int, Float, Float)])
+    registerClass[Int, Int, Int](kryo)
 
     // This avoids a large number of hash table lookups.
     kryo.setReferences(false)
   }
 
-  private def registerClass[VD: Manifest, ED: Manifest](kryo: Kryo) {
-    //kryo.register(classManifest[VD].erasure)
-    // kryo.register(classManifest[ED].erasure)
-    kryo.register(classOf[(Vid, Vid, ED)])
-    kryo.register(classOf[(Vid, ED)])
-    //kryo.register(classOf[EdgeBlockRecord[ED]])
+  private def registerClass[VD: Manifest, ED: Manifest, VD2: Manifest](kryo: Kryo) {
+    kryo.register(classOf[Vertex[VD]])
+    kryo.register(classOf[Edge[ED]])
+    kryo.register(classOf[MutableTuple2[VD, VD2]])
+    kryo.register(classOf[(Vid, VD2)])
   }
 }
diff --git a/graph/src/main/scala/spark/graph/package.scala b/graph/src/main/scala/spark/graph/package.scala
index e7ec3f6e86..cf1b23ca5d 100644
--- a/graph/src/main/scala/spark/graph/package.scala
+++ b/graph/src/main/scala/spark/graph/package.scala
@@ -11,4 +11,11 @@ package object graph {
    * Return the default null-like value for a data type T.
    */
   def nullValue[T] = null.asInstanceOf[T]
+
+
+  private[graph]
+  case class MutableTuple2[@specialized(Char, Int, Boolean, Byte, Long, Float, Double) U,
+                           @specialized(Char, Int, Boolean, Byte, Long, Float, Double) V](
+    var _1: U, var _2: V)
+
 }