[pypy-commit] pypy default: Document this branch

[alex_gaynor]

Author: Alex Gaynor <alex.gaynor at gmail.com>
Branch: 
Changeset: r68910:73e7be19afcd
Date: 2014-01-24 10:50 -0600
http://bitbucket.org/pypy/pypy/changeset/73e7be19afcd/

Log:	Document this branch

diff --git a/pypy/doc/whatsnew-head.rst b/pypy/doc/whatsnew-head.rst
--- a/pypy/doc/whatsnew-head.rst
+++ b/pypy/doc/whatsnew-head.rst
@@ -52,3 +52,8 @@
 .. branch: annotator
 Remove FlowObjSpace.
 Improve cohesion between rpython.flowspace and rpython.annotator.
+
+.. branch: detect-immutable-fields
+mapdicts keep track of whether or not an attribute is every assigned to
+multiple times. If it's only assigned once then an elidable lookup is used when
+possible.