diff -r 9aebeea7ac00 -r bbc78cb1bf15 mercurial/context.py
--- a/mercurial/context.py	Sat Jul 04 14:18:15 2009 +0100
+++ b/mercurial/context.py	Thu Jul 09 19:49:02 2009 -0500
@@ -293,6 +293,7 @@
 
     def linkrev(self): return self._filelog.linkrev(self._filerev)
     def node(self): return self._changectx.node()
+    def hex(self): return hex(self.node())
     def user(self): return self._changectx.user()
     def date(self): return self._changectx.date()
     def files(self): return self._changectx.files()
@@ -381,11 +382,11 @@
                 child[0][b1:b2] = parent[0][a1:a2]
             return child
 
-        getlog = util.cachefunc(lambda x: self._repo.file(x))
+        getlog = util.lrucachefunc(lambda x: self._repo.file(x))
         def getctx(path, fileid):
             log = path == self._path and self._filelog or getlog(path)
             return filectx(self._repo, path, fileid=fileid, filelog=log)
-        getctx = util.cachefunc(getctx)
+        getctx = util.lrucachefunc(getctx)
 
         def parents(f):
             # we want to reuse filectx objects as much as possible