Sean Upton's optimization of BTreeFolder2.objectIds(). Should speed up

certain operations significantly.

lib/python/Products/BTreeFolder2/BTreeFolder2.py

@@ -341,10 +341,13 @@ class BTreeFolder2Base (Persistent):
         # Returns a list of subobject ids of the current object.
         # If 'spec' is specified, returns objects whose meta_type
         # matches 'spec'.
-        if spec is not None:
+
+        mti = self._mt_index
+        if spec is None:
+            spec = mti.keys() #all meta types
+
         if isinstance(spec, StringType):
             spec = [spec]
-            mti = self._mt_index
         set = None
         for meta_type in spec:
             ids = mti.get(meta_type, None)
@@ -354,8 +357,6 @@ class BTreeFolder2Base (Persistent):
             return ()
         else:
             return set.keys()
-        else:
-            return self._tree.keys()
 
 
     security.declareProtected(access_contents_information,