Avoid parsing in Basic lookup

Author: bahusoid

src/NHibernate/Type/TypeFactory.cs

@@ -404,6 +404,11 @@ public static IType Basic(string name)
 		/// This method will return null if the name is not found in the basicNameMap.
 		/// </remarks>
 		public static IType Basic(string name, IDictionary<string, string> parameters)
+		{
+			return Basic(name, parameters, parseName: true);
+		}
+
+		private static IType Basic(string name, IDictionary<string, string> parameters, bool parseName)
 		{
 			string typeName;
 
@@ -426,6 +431,9 @@ public static IType Basic(string name, IDictionary<string, string> parameters)
 				return returnType;
 			}
 
+			if (!parseName)
+				return null;
+
 			// if we get to here then the basic type with the length or precision/scale
 			// combination doesn't exists - so lets figure out which one we have and
 			// invoke the appropriate delegate
@@ -593,7 +601,7 @@ private static IType HeuristicType(System.Type typeClass, IDictionary<string, st
 		{
 			if(tryBasic)
 			{
-				IType type = Basic(typeClass.AssemblyQualifiedName, parameters);
+				IType type = Basic(typeClass.AssemblyQualifiedName, parameters, parseName: false);
 
 				if (type != null)
 					return type;