Repurpose unused Timer.cs and add some loading perf metrics

OpenRA.Game/Game.cs

@@ -246,11 +246,18 @@ namespace OpenRA
 		{
 			BeforeGameStart();
 
-			var map = modData.PrepareMap(mapUID);
+			Map map;
+			using (new PerfTimer("PrepareMap"))
+			{
+				map = modData.PrepareMap(mapUID);
+			}
 			orderManager.world = new World(modData.Manifest, map, orderManager, isShellmap);
 			orderManager.world.Timestep = Timestep;
 			worldRenderer = new WorldRenderer(orderManager.world);
+			using (new PerfTimer("LoadComplete"))
+			{
 				orderManager.world.LoadComplete(worldRenderer);
+			}
 
 			if (orderManager.GameStarted)
 				return;
@@ -385,7 +392,10 @@ namespace OpenRA
 			modData = new ModData(mod);
 			Renderer.InitializeFonts(modData.Manifest);
 			modData.InitializeLoaders();
+			using (new PerfTimer("LoadMaps"))
+			{
 				modData.MapCache.LoadMaps();
+			}
 
 			PerfHistory.items["render"].hasNormalTick = false;
 			PerfHistory.items["batches"].hasNormalTick = false;
@@ -436,7 +446,12 @@ namespace OpenRA
 
 		public static void LoadShellMap()
 		{
-			StartGame(ChooseShellmap(), true);
+			string shellMap = ChooseShellmap();
+
+			using (new PerfTimer("StartGame"))
+			{
+				StartGame(shellMap, true);
+			}
 		}
 
 		static string ChooseShellmap()

OpenRA.Game/ModData.cs

@@ -118,11 +118,17 @@ namespace OpenRA
 			// Mount map package so custom assets can be used. TODO: check priority.
 			GlobalFileSystem.Mount(GlobalFileSystem.OpenPackage(map.Path, null, int.MaxValue));
 
+			using (new Support.PerfTimer("LoadRules"))
+			{
 				Rules.LoadRules(Manifest, map);
+			}
 			SpriteLoader = new SpriteLoader(Rules.TileSets[map.Tileset].Extensions, SheetBuilder);
 
+			using (new Support.PerfTimer("SequenceProvider.Initialize"))
+			{
 				// TODO: Don't load the sequences for assets that are not used in this tileset. Maybe use the existing EditorTilesetFilters.
 				SequenceProvider.Initialize(Manifest.Sequences, map.Sequences);
+			}
 			VoxelProvider.Initialize(Manifest.VoxelSequences, map.VoxelSequences);
 			return map;
 		}

OpenRA.Game/OpenRA.Game.csproj

@@ -293,7 +293,7 @@
     <Compile Include="Primitives\Set.cs" />
     <Compile Include="Support\Log.cs" />
     <Compile Include="Support\Stopwatch.cs" />
-    <Compile Include="Support\Timer.cs" />
+    <Compile Include="Support\PerfTimer.cs" />
     <Compile Include="Exts.cs" />
     <Compile Include="Hotkey.cs" />
     <Compile Include="Keycode.cs" />

OpenRA.Game/Support/PerfTimer.cs

@@ -0,0 +1,42 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2014 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using System;
+
+namespace OpenRA.Support
+{
+	public class PerfTimer : IDisposable
+	{
+		readonly Stopwatch sw = new Stopwatch();
+		readonly string Name;
+		static System.Threading.ThreadLocal<int> depth = new System.Threading.ThreadLocal<int>();
+
+		public PerfTimer(string name)
+		{
+			this.Name = name;
+			depth.Value++;
+		}
+
+		public void Dispose()
+		{
+			string indentation;
+
+			if (--depth.Value >= 0)
+				indentation = new string('\t', depth.Value);
+			else
+			{
+				depth.Value = 0;
+				indentation = string.Empty;
+			}
+
+			Log.Write("perf", "{0}{1}: {2} ms", indentation, this.Name, Math.Round(this.sw.Elapsed.TotalMilliseconds));
+		}
+	}
+}

OpenRA.Game/Support/Timer.cs

@@ -1,27 +0,0 @@
-#region Copyright & License Information
-/*
- * Copyright 2007-2014 The OpenRA Developers (see AUTHORS)
- * This file is part of OpenRA, which is free software. It is made
- * available to you under the terms of the GNU General Public License
- * as published by the Free Software Foundation. For more information,
- * see COPYING.
- */
-#endregion
-
-namespace OpenRA.Support
-{
-	public static class Timer
-	{
-		static Stopwatch sw = new Stopwatch();
-		static System.TimeSpan lastTime;
-
-		public static void Time( string message )
-		{
-			var time = sw.Elapsed;
-			var dt = time - lastTime;
-			if( dt.TotalSeconds > 0.0001 )
-				Log.Write("perf", message, dt.TotalSeconds );
-			lastTime = time;
-		}
-	}
-}