[PATCH] largefiles: improve status performance

[Levi Bard]

# HG changeset patch
# User Levi Bard <levi at unity3d.com>
# Date 1340540784 -7200
# Node ID ffc9863d33de86841aa0d93364fa071854d04ae5
# Parent  efd2e14f72353626355dc82465bdf23bf6416aa2
largefiles: improve status performance

Synchronize largefiles' mtimes when updating them.
This greatly reduces the amount of superfluous largefile hashing status does.

Benchmarked on a 1GB repo with 54000 normal files and 113 largefiles:
Without largefiles: 600ms
With largefiles - before: 2500ms
With largefiles - after: 700ms

diff -r efd2e14f7235 -r ffc9863d33de hgext/largefiles/lfcommands.py
--- a/hgext/largefiles/lfcommands.py	Thu Jun 21 17:37:02 2012 -0500
+++ b/hgext/largefiles/lfcommands.py	Sun Jun 24 14:26:24 2012 +0200
@@ -479,6 +479,16 @@
                 # recognition that such cache missing files are REMOVED.
                 lfdirstate.normallookup(lfile)
                 return None # don't try to set the mode
+            else:
+                try:
+                    # Synchronize largefile's last modified time
+                    # with dirstate
+                    state, mode, size, time = lfdirstate.dmap(lfile)
+                    if -1 != time:
+                        # Don't force-synchronize -1 "dirty" mtime
+                        os.utime(abslfile, (-1, time))
+                except KeyError:
+                    pass
             ret = 1
         mode = os.stat(absstandin).st_mode
         if mode != os.stat(abslfile).st_mode:
diff -r efd2e14f7235 -r ffc9863d33de hgext/largefiles/lfutil.py
--- a/hgext/largefiles/lfutil.py	Thu Jun 21 17:37:02 2012 -0500
+++ b/hgext/largefiles/lfutil.py	Sun Jun 24 14:26:24 2012 +0200
@@ -140,6 +140,8 @@
         return super(largefilesdirstate, self).forget(unixpath(f))
     def normallookup(self, f):
         return super(largefilesdirstate, self).normallookup(unixpath(f))
+    def dmap(self, f):
+        return self._map[f]
 
 def openlfdirstate(ui, repo):
     '''