# HG changeset patch
# User Siddharth Agarwal <sid0@fb.com>
# Date 2014-09-30 23:01:19
# Node ID 1257cc6c1a2f23eb574737ab5774c8fad1fc0acd
# Parent  ec47d4fde26db0d76d087ca74825d115d2b9486f

files: cache repo.dirstate

For a large repo, 'hg files' goes from 2.27 seconds to 1.92.

diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -3219,8 +3219,9 @@ def files(ui, repo, *pats, **opts):
     fmt = '%s' + end
 
     m = scmutil.match(ctx, pats, opts)
+    ds = repo.dirstate
     for f in ctx.matches(m):
-        if rev is None and repo.dirstate[f] == 'r':
+        if rev is None and ds[f] == 'r':
             continue
         fm.startitem()
         if ui.verbose: