diff --git a/OpenRA.Game/Game.cs b/OpenRA.Game/Game.cs
index 43f98f040c..41f99ebfb9 100755
--- a/OpenRA.Game/Game.cs
+++ b/OpenRA.Game/Game.cs
@@ -148,6 +148,7 @@ namespace OpenRA
 			PerfHistory.items["render"].Tick();
 			PerfHistory.items["batches"].Tick();
 			PerfHistory.items["render_widgets"].Tick();
+			PerfHistory.items["render_flip"].Tick();
 
 			afterTickActions.PerformActions();
 		}
@@ -303,6 +304,7 @@ namespace OpenRA
 			PerfHistory.items["render"].hasNormalTick = false;
 			PerfHistory.items["batches"].hasNormalTick = false;
 			PerfHistory.items["render_widgets"].hasNormalTick = false;
+			PerfHistory.items["render_flip"].hasNormalTick = false;
 
 			JoinLocal();
 			viewport = new Viewport(new int2(Renderer.Resolution), Rectangle.Empty, Renderer);
diff --git a/OpenRA.Game/Graphics/Viewport.cs b/OpenRA.Game/Graphics/Viewport.cs
index 5786cd3000..7f77ea6c9f 100755
--- a/OpenRA.Game/Graphics/Viewport.cs
+++ b/OpenRA.Game/Graphics/Viewport.cs
@@ -49,7 +49,7 @@ namespace OpenRA.Graphics
 			scrollPosition = newScrollPosition;
 		}
 		
-		private int2 NormalizeScrollPosition(int2 newScrollPosition)
+		int2 NormalizeScrollPosition(int2 newScrollPosition)
 		{
 			return newScrollPosition.Clamp(adjustedMapBounds);
 		}
@@ -97,7 +97,10 @@ namespace OpenRA.Graphics
 	                Game.modData.Palette.GetPaletteIndex(cursorSequence.Palette));
 			}
 
-			renderer.EndFrame( inputHandler );
+			using( new PerfSample("render_flip") )
+			{
+				renderer.EndFrame( inputHandler );
+			}
 		}
 
 		public void Tick()
@@ -109,6 +112,7 @@ namespace OpenRA.Graphics
 		{
 			return (1f / Game.CellSize) * (loc.ToFloat2() + Location);
 		}
+		
 		public float2 ViewToWorld(MouseInput mi)
 		{
 			return ViewToWorld(mi.Location);