save(): Fiddled the control flow to put the normal case where it

belongs.  This is a much smaller change than it may appear:  the bulk
of the function merely got unindented by one level.

Lib/pickle.py

@@ -270,6 +270,12 @@ class Pickler:
         try:
             f = self.dispatch[t]
         except KeyError:
+            pass
+        else:
+            f(self, object)
+            return
+
+        # The dispatch table doesn't know about type t.
         try:
             issc = issubclass(t, TypeType)
         except TypeError: # t is not a class
@@ -322,9 +328,6 @@ class Pickler:
         memo_len = len(memo)
         self.write(self.put(memo_len))
         memo[d] = (memo_len, object)
-            return
-
-        f(self, object)
 
     def persistent_id(self, object):
         return None