Merged revisions 72223 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r72223 | antoine.pitrou | 2009-05-02 23:13:23 +0200 (sam., 02 mai 2009) | 5 lines

  Isue #5084: unpickling now interns the attribute names of pickled objects,
  saving memory and avoiding growth in size of subsequent pickles. Proposal
  and original patch by Jake McGuire.
........

1 files changed, 9 insertions, 1 deletions

diff --git a/Lib/pickle.py b/Lib/pickle.py
index 409d4b2a1a..b94b3058cd 100644
--- a/Lib/pickle.py
+++ b/Lib/pickle.py
@@ -1195,7 +1195,15 @@ class _Unpickler:
         if isinstance(state, tuple) and len(state) == 2:
             state, slotstate = state
         if state:
-            inst.__dict__.update(state)
+            d = inst.__dict__
+            intern = sys.intern
+            try:
+                for k, v in state.items():
+                    d[intern(k)] = v
+            # keys in state don't have to be strings
+            # don't blow up, but don't go out of our way
+            except TypeError:
+                d.update(state)
         if slotstate:
             for k, v in slotstate.items():
                 setattr(inst, k, v)