# HG changeset patch
# User mpm@selenic.com
# Date 1118858800 28800
# Node ID 9f4077d7ef6fd889f1cc8434701b24f53784ee87
# Parent  1cb3d9d5119ee9b1c3c2978590d26ee189e65aa5
[PATCH] manifest.readflags performance buglet

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[PATCH] manifest.readflags performance buglet

From: Chris Mason <mason@suse.com>

Performance buglet in manifest.readflags: only re-read the manifest
when the mapcache is not present or does not correspond to this node

manifest hash: 188ad778308a2e5c885d452d7b7e61c082e8ceb2
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diff --git a/mercurial/hg.py b/mercurial/hg.py
--- a/mercurial/hg.py
+++ b/mercurial/hg.py
@@ -113,7 +113,7 @@ class manifest(revlog):
 
     def readflags(self, node):
         if node == nullid: return {} # don't upset local cache
-        if self.mapcache or self.mapcache[0] != node:
+        if not self.mapcache or self.mapcache[0] != node:
             self.read(node)
         return self.mapcache[2]