diff --git a/anabatic/src/GCell.cpp b/anabatic/src/GCell.cpp
index c1454f1a..1ae7ea86 100644
--- a/anabatic/src/GCell.cpp
+++ b/anabatic/src/GCell.cpp
@@ -298,6 +298,7 @@ namespace Anabatic {
     , _contacts      ()
     , _depth         (Session::getRoutingGauge()->getDepth())
     , _pinDepth      (0)
+    , _satProcessed  (0)
     , _rpCount       (0)
     , _blockages     (new DbU::Unit [_depth])
     , _cDensity      (0.0)
diff --git a/anabatic/src/LayerAssign.cpp b/anabatic/src/LayerAssign.cpp
index fd5424d5..3943e3d7 100644
--- a/anabatic/src/LayerAssign.cpp
+++ b/anabatic/src/LayerAssign.cpp
@@ -368,10 +368,13 @@ namespace Anabatic {
           
           if (not finished) {
             optimized = gcell->stepNetDesaturate( depth, globalNets, invalidateds );
+            gcell->setSatProcessed( depth );
             if (optimized) {
               for ( GCell* gcell : invalidateds ) {
-                queue.push( gcell->cloneKey(depth) );
+                if (not gcell->isSatProcessed(depth))
+                  queue.push( gcell->cloneKey(depth) );
               }
+              invalidateds.clear();
             }
           }
         }
@@ -830,7 +833,7 @@ namespace Anabatic {
     cmess1 << "  o  Balance Global Density "
            << Session::getRoutingGauge()->getRoutingLayer(depth)->getName() << endl;
 
-    GCellDensitySet queue ( depth, getGCells()) );
+    GCellDensitySet queue ( depth, getGCells() );
     GCell::Set      invalidateds;
 
     bool optimized = true;
diff --git a/anabatic/src/anabatic/GCell.h b/anabatic/src/anabatic/GCell.h
index 8660d7c5..c2f505be 100644
--- a/anabatic/src/anabatic/GCell.h
+++ b/anabatic/src/anabatic/GCell.h
@@ -140,6 +140,7 @@ namespace Anabatic {
     public:                                                    
       static        GCell*                create               ( AnabaticEngine* );
     public:                                                    
+      inline        bool                  isSatProcessed       ( size_t depth ) const;
       inline        bool                  isSaturated          () const;
                     bool                  isSaturated          ( size_t depth ) const;
       inline        bool                  isInvalidated        () const;
@@ -257,6 +258,7 @@ namespace Anabatic {
                     size_t                checkDensity         () const;
                     bool                  checkEdgeSaturation  ( size_t hreserved, size_t vreserved) const;
                     void                  setType              ( Flags );
+      inline        void                  setSatProcessed      ( size_t depth );
                     void                  addBlockage          ( size_t depth, DbU::Unit );
       inline        void                  addHSegment          ( AutoSegment* );
       inline        void                  addVSegment          ( AutoSegment* );
@@ -334,6 +336,7 @@ namespace Anabatic {
               vector<AutoContact*>  _contacts;
               size_t                _depth;
               size_t                _pinDepth;
+              uint32_t              _satProcessed;
               int                   _rpCount;
               DbU::Unit*            _blockages;
               float                 _cDensity;
@@ -486,6 +489,12 @@ namespace Anabatic {
   inline  void  GCell::addContact ( AutoContact* contact )
   { _flags |= Flags::Invalidated; _contacts.push_back(contact); }
 
+  inline bool GCell::isSatProcessed ( size_t depth ) const
+  { return (_satProcessed & (1 << depth)); }
+
+  inline void GCell::setSatProcessed ( size_t depth )
+  { _satProcessed |= (1 << depth); }
+
 
   inline bool  operator< ( const GCell& lhs, const GCell& rhs )
   {