# HG changeset patch
# User Siddharth Agarwal <sid0@fb.com>
# Date 2014-10-04 01:48:09
# Node ID a1eb21f5caea4366310e32aa85248791d5bbfa0c
# Parent  70624fda193d022ed85a88c26177137c1d807a8b

dirstate: cache util.normcase while constructing the foldmap

This is a small win on OS X. hg perfdirstatefoldmap:

before: wall 0.399708 comb 0.410000 user 0.390000 sys 0.020000 (best of 25)
after:  wall 0.386331 comb 0.390000 user 0.370000 sys 0.020000 (best of 25)

diff --git a/mercurial/dirstate.py b/mercurial/dirstate.py
--- a/mercurial/dirstate.py
+++ b/mercurial/dirstate.py
@@ -84,11 +84,12 @@ class dirstate(object):
     @propertycache
     def _foldmap(self):
         f = {}
+        normcase = util.normcase
         for name, s in self._map.iteritems():
             if s[0] != 'r':
-                f[util.normcase(name)] = name
+                f[normcase(name)] = name
         for name in self._dirs:
-            f[util.normcase(name)] = name
+            f[normcase(name)] = name
         f['.'] = '.' # prevents useless util.fspath() invocation
         return f