Add DictionaryPool

MaterialGraphProject/Assets/GraphFramework/SerializableGraph/Runtime/Util/ListPool.cs

     public static class ListPool<T>
     {
         // Object pool to avoid allocations.
-        private static readonly ObjectPool<List<T>> s_ListPool = new ObjectPool<List<T>>(null, l => l.Clear());
+        static readonly ObjectPool<List<T>> s_ListPool = new ObjectPool<List<T>>(null, l => l.Clear());
 
         public static List<T> Get()
         {

MaterialGraphProject/Assets/UnityShaderEditor/Runtime/Nodes/AbstractMaterialNode.cs

                 }
             }
 
-            var dynamicInputSlotsToCompare = new Dictionary<MaterialSlot, ConcreteSlotValueType>();
-            var skippedDynamicSlots = new List<MaterialSlot>();
+            var dynamicInputSlotsToCompare = DictionaryPool<MaterialSlot, ConcreteSlotValueType>.Get();
+            var skippedDynamicSlots = ListPool<MaterialSlot>.Get();
 
             // iterate the input slots
             foreach (var inputSlot in GetInputSlots<MaterialSlot>())
             {
                 ++version;
             }
+
+            ListPool<MaterialSlot>.Release(skippedDynamicSlots);
+            DictionaryPool<MaterialSlot, ConcreteSlotValueType>.Release(dynamicInputSlotsToCompare);
+
         }
 
         public int version { get; private set; }

MaterialGraphProject/Assets/GraphFramework/SerializableGraph/Runtime/Util/DictionaryPool.cs

+using System.Collections.Generic;
+
+namespace UnityEngine.Graphing
+{
+    public static class DictionaryPool<TKey, TValue>
+    {
+        // Object pool to avoid allocations.
+        static readonly ObjectPool<Dictionary<TKey, TValue>> k_Pool = new ObjectPool<Dictionary<TKey, TValue>>(null, l => l.Clear());
+
+        public static Dictionary<TKey, TValue> Get()
+        {
+            return k_Pool.Get();
+        }
+
+        public static PooledObject<Dictionary<TKey, TValue>> GetDisposable()
+        {
+            return k_Pool.GetDisposable();
+        }
+
+        public static void Release(Dictionary<TKey, TValue> toRelease)
+        {
+            k_Pool.Release(toRelease);
+        }
+    }
+}

MaterialGraphProject/Assets/GraphFramework/SerializableGraph/Runtime/Util/DictionaryPool.cs.meta

+fileFormatVersion: 2
+guid: 7624128bb110449387b7142499b45c91
+timeCreated: 1504252645