diff -r 000000000000 -r 0d40e90630ef web/lib/django/contrib/sessions/backends/cached_db.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/django/contrib/sessions/backends/cached_db.py	Wed Jan 20 00:34:04 2010 +0100
@@ -0,0 +1,42 @@
+"""
+Cached, database-backed sessions.
+"""
+
+from django.conf import settings
+from django.contrib.sessions.backends.db import SessionStore as DBStore
+from django.core.cache import cache
+
+class SessionStore(DBStore):
+    """
+    Implements cached, database backed sessions.
+    """
+
+    def __init__(self, session_key=None):
+        super(SessionStore, self).__init__(session_key)
+
+    def load(self):
+        data = cache.get(self.session_key, None)
+        if data is None:
+            data = super(SessionStore, self).load()
+            cache.set(self.session_key, data, settings.SESSION_COOKIE_AGE)
+        return data
+
+    def exists(self, session_key):
+        return super(SessionStore, self).exists(session_key)
+
+    def save(self, must_create=False):
+        super(SessionStore, self).save(must_create)
+        cache.set(self.session_key, self._session, settings.SESSION_COOKIE_AGE)
+
+    def delete(self, session_key=None):
+        super(SessionStore, self).delete(session_key)
+        cache.delete(session_key or self.session_key)
+
+    def flush(self):
+        """
+        Removes the current session data from the database and regenerates the
+        key.
+        """
+        self.clear()
+        self.delete(self.session_key)
+        self.create()
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