# HG changeset patch
# User Siddharth Agarwal <sid0@fb.com>
# Date 2015-04-01 02:34:37
# Node ID 6514030dc6864a9287e7f50ca65abfb80f154847
# Parent  b38bcf18993cd9cbdade07834061659b631c4d8c

dirstate._normalize: don't construct dirfoldmap if not necessary

Constructing the dirfoldmap is expensive, so if there's a hit in the
filefoldmap, don't construct the directory foldmap.

This helps with cases like 'hg add foo' where foo is already tracked: for a
large repository, the operation goes from 1.5 seconds to 1.2 (which is still
way too much, but that's a matter for another day.)

diff --git a/mercurial/dirstate.py b/mercurial/dirstate.py
--- a/mercurial/dirstate.py
+++ b/mercurial/dirstate.py
@@ -509,8 +509,9 @@ class dirstate(object):
 
     def _normalize(self, path, isknown, ignoremissing=False, exists=None):
         normed = util.normcase(path)
-        folded = self._filefoldmap.get(normed,
-                                       self._dirfoldmap.get(normed, None))
+        folded = self._filefoldmap.get(normed, None)
+        if folded is None:
+            folded = self._dirfoldmap.get(normed, None)
         if folded is None:
             if isknown:
                 folded = path