diff --git a/hgext3rd/perftweaks.py b/hgext3rd/perftweaks.py
--- a/hgext3rd/perftweaks.py
+++ b/hgext3rd/perftweaks.py
@@ -97,17 +97,6 @@
         self.tipnode = cl.node(tiprev)
         self.tiprev = tiprev
 
-    # Copy and paste from branchmap.branchcache.update()
-    if not self.validfor(repo):
-        # cache key are not valid anymore
-        self.tipnode = nullid
-        self.tiprev = nullrev
-        for heads in self.values():
-            tiprev = max(cl.rev(node) for node in heads)
-            if tiprev > self.tiprev:
-                self.tipnode = cl.node(tiprev)
-                self.tiprev = tiprev
-    self.filteredhash = scmutil.filteredhash(repo, self.tiprev)
     repo.ui.log('branchcache', 'perftweaks updated %s branch cache\n',
                 repo.filtername)