having a look at this perf stuff...

OpenRA.Game/Game.cs

@@ -477,5 +477,10 @@ namespace OpenRA
 		{
 			quit = true;
 		}
+
+		public static void Debug(string s)
+		{
+			chat.AddLine(Color.White, "Debug", s);
+		}
 	}
 }

OpenRA.Game/Orders/UnitOrderGenerator.cs

@@ -53,7 +53,7 @@ namespace OpenRA.Orders
 
 		string ChooseCursor(World world, MouseInput mi)
 		{
-			using (new PerfSample("cursor"))
+			//using (new PerfSample("cursor"))
 			{
 				var p = Game.controller.MousePosition;
 				var c = Order(world, p.ToInt2(), mi)

OpenRA.Game/PathFinder.cs

@@ -50,6 +50,8 @@ namespace OpenRA
 		{
 			using (new PerfSample("find_unit_path"))
 			{
+				Game.Debug("FindUnitPath {0} -> {1}".F(from, target));
+
 				var pb = FindBidiPath(
 					PathSearch.FromPoint(world, target, from, umt, false).WithCustomBlocker(AvoidUnitsNear(from, 4)),
 					PathSearch.FromPoint(world, from, target, umt, false).WithCustomBlocker(AvoidUnitsNear(from, 4)));
@@ -61,7 +63,7 @@ namespace OpenRA
 
 		public List<int2> FindUnitPathToRange( int2 src, int2 target, UnitMovementType umt, int range )
 		{
-			using( new PerfSample( "find_unit_path_multiple_src" ) )
+			//using( new PerfSample( "find_unit_path_multiple_src" ) )
 			{
 				var tilesInRange = world.FindTilesInCircle(target, range)
 					.Where( t => world.IsPathableCell( t, umt ) );
@@ -82,7 +84,7 @@ namespace OpenRA
 
 		public List<int2> FindPath( PathSearch search )
 		{
-			using (new PerfSample("find_path_inner"))
+			//using (new PerfSample("find_path_inner"))
 			{
 				while (!search.queue.Empty)
 				{

OpenRA.Game/Shroud.cs

@@ -25,6 +25,7 @@ using OpenRA.FileFormats;
 using OpenRA.GameRules;
 using OpenRA.Graphics;
 using OpenRA.Traits;
+using OpenRA.Support;
 
 namespace OpenRA
 {
@@ -112,19 +113,22 @@ namespace OpenRA
 
 		public void Explore(World w, int2 center, int range)
 		{
-			if (range == 0)
+			using (new PerfSample("explore"))
-				return;
-
-			var box = MakeRect(center, range);
-			bounds = bounds.HasValue ? 
-				Rectangle.Union(bounds.Value, box) : box;
-			
-			foreach (var t in w.FindTilesInCircle(center, range))
 			{
-				explored[t.X, t.Y] = true;
+				if (range == 0)
-				gapField[t.X, t.Y] = 0;
+					return;
+
+				var box = MakeRect(center, range);
+				bounds = bounds.HasValue ?
+					Rectangle.Union(bounds.Value, box) : box;
+
+				foreach (var t in w.FindTilesInCircle(center, range))
+				{
+					explored[t.X, t.Y] = true;
+					gapField[t.X, t.Y] = 0;
+				}
+				dirty = true;
 			}
-			dirty = true;
 		}
 		
 		public void Explore(Actor a)

OpenRA.Game/Support/PerfHistory.cs

@@ -29,7 +29,11 @@ namespace OpenRA.Support
 {
 	static class PerfHistory
 	{
-		static readonly Color[] colors = { Color.Red, Color.Green, Color.Blue, Color.Yellow, Color.Orange, Color.Fuchsia, Color.Lime, Color.LightBlue, Color.White, Color.Black };
+		static readonly Color[] colors = { Color.Red, Color.Green, 
+											 Color.Blue, Color.Yellow, 
+											 Color.Orange, Color.Fuchsia, 
+											 Color.Lime, Color.LightBlue, 
+											 Color.White, Color.Teal };
 		static int nextColor;
 
 		public static Cache<string, PerfItem> items = new Cache<string, PerfItem>(

OpenRA.Game/Traits/Activities/Move.cs

@@ -64,7 +64,8 @@ namespace OpenRA.Traits.Activities
 			this.getPath = (self, mobile) => 
 				self.World.PathFinder.FindPath(
 					PathSearch.FromPoint( self.World, self.Location, destination, mobile.GetMovementType(), false )
-					.WithCustomBlocker( self.World.PathFinder.AvoidUnitsNear( self.Location, 4 )).WithIgnoredBuilding( ignoreBuilding ));
+					.WithCustomBlocker( self.World.PathFinder.AvoidUnitsNear( self.Location, 4 ))
+					.WithIgnoredBuilding( ignoreBuilding ));
 
 			this.destination = destination;
 			this.nearEnough = 0;

OpenRA.Game/World.cs

@@ -166,7 +166,7 @@ namespace OpenRA
 
 		public int SyncHash()
 		{
-			using (new PerfSample("synchash"))
+			//using (new PerfSample("synchash"))
 			{
 				int ret = 0;
 				foreach (var a in Actors)