Fix component equality failure

Minimal fix for NH-3480

Author: fredericDelaporte

src/NHibernate.Test/Async/NHSpecificTest/NH3480/Fixture.cs

@@ -68,8 +68,9 @@ public async Task TestAsync()
 					var entity = await (result.SingleAsync());
 
 					await (NHibernateUtil.InitializeAsync(entity.Children));
+					Assert.That(entity.Children, Has.Count.GreaterThan(0));
 				}
 			}
 		}
 	}
-}
+}

src/NHibernate.Test/NHSpecificTest/NH3480/Fixture.cs

@@ -57,8 +57,9 @@ public void Test()
 					var entity = result.Single();
 
 					NHibernateUtil.Initialize(entity.Children);
+					Assert.That(entity.Children, Has.Count.GreaterThan(0));
 				}
 			}
 		}
 	}
-}
+}

src/NHibernate/Type/ComponentType.cs

@@ -570,14 +570,10 @@ public override int Compare(object x, object y)
 
 		public override bool IsEqual(object x, object y)
 		{
-			if (x == y)
-			{
-				return true;
-			}
-			if (x == null || y == null)
-			{
-				return false;
-			}
+			var isEqualFast = IsEqualFast(x, y);
+			if (isEqualFast.HasValue)
+				return isEqualFast.Value;
+
 			object[] xvalues = GetPropertyValues(x);
 			object[] yvalues = GetPropertyValues(y);
 			for (int i = 0; i < propertySpan; i++)
@@ -592,14 +588,10 @@ public override bool IsEqual(object x, object y)
 
 		public override bool IsEqual(object x, object y, ISessionFactoryImplementor factory)
 		{
-			if (x == y)
-			{
-				return true;
-			}
-			if (x == null || y == null)
-			{
-				return false;
-			}
+			var isEqualFast = IsEqualFast(x, y);
+			if (isEqualFast.HasValue)
+				return isEqualFast.Value;
+
 			object[] xvalues = GetPropertyValues(x);
 			object[] yvalues = GetPropertyValues(y);
 			for (int i = 0; i < propertySpan; i++)
@@ -612,6 +604,24 @@ public override bool IsEqual(object x, object y, ISessionFactoryImplementor fact
 			return true;
 		}
 
+		private bool? IsEqualFast(object x, object y)
+		{
+			if (x == y)
+			{
+				return true;
+			}
+			if (x == null || y == null)
+			{
+				return false;
+			}
+
+			var componentType = EntityMode == EntityMode.Poco ? ComponentTuplizer.MappedClass : typeof(IDictionary);
+			if (!componentType.IsInstanceOfType(x) || !componentType.IsInstanceOfType(y))
+				return false;
+
+			return null;
+		}
+
 		public virtual bool IsMethodOf(MethodBase method)
 		{
 			return false;