[Ide[ Configure Gtk# for slim startup (#9364)

* [Ide[ Configure Gtk# for slim startup

* Fix up startup tracker slices.

Xamarin.Mac is init as part of gtk init, skewing info

Author: Therzok

main/src/core/MonoDevelop.Ide/MonoDevelop.Components/IdeTheme.cs

@@ -76,15 +76,12 @@ internal static void InitializeGtk (string progname, ref string[] args)
 		{
 			if (Gtk.Settings.Default != null)
 				throw new InvalidOperationException ("Gtk already initialized!");
-			
-			//HACK: we must initilize some Gtk rc before Gtk.Application is initialized on Mac/Windows
-			//      otherwise it will not be loaded correctly and theme switching won't work.
-			if (!Platform.IsLinux)
-				UpdateGtkTheme ();
 
+			IdeStartupTracker.StartupTracker.MarkSection ("PreGtkInitialization");
 #if MAC
 			// Early init Cocoa through xwt
 			var loaded = NativeToolkitHelper.LoadCocoa ();
+			IdeStartupTracker.StartupTracker.MarkSection ("XamarinMacInitialization");
 
 			var disableA11y = Environment.GetEnvironmentVariable ("DISABLE_ATKCOCOA");
 			if (Platform.IsMac && (NSUserDefaults.StandardUserDefaults.BoolForKey ("com.monodevelop.AccessibilityEnabled") && string.IsNullOrEmpty (disableA11y))) {
@@ -103,6 +100,11 @@ internal static void InitializeGtk (string progname, ref string[] args)
 				AccessibilityEnabled = false;
 			}
 #endif
+			//HACK: we must initilize some Gtk rc before Gtk.Application is initialized on Mac/Windows
+			//      otherwise it will not be loaded correctly and theme switching won't work.
+			if (!Platform.IsLinux)
+				UpdateGtkTheme ();
+
 			Gtk.Application.Init (BrandingService.ApplicationName, ref args);
 
 			// Reset our environment after initialization on Mac

main/src/core/MonoDevelop.Ide/MonoDevelop.Ide/IdeStartup.cs

@@ -82,6 +82,8 @@ static void UnsetEnvironmentVariables()
 			Environment.SetEnvironmentVariable ("MONO_GC_PARAMS", null);
 			Environment.SetEnvironmentVariable ("MONO_SLEEP_ABORT_LIMIT", null);
 			Environment.SetEnvironmentVariable ("MONO_THREADS_SUSPEND", null);
+
+			Environment.SetEnvironmentVariable ("GTKSHARP_SLIM_STARTUP", "yes");
 		}
 
 		int Run (MonoDevelopOptions options)
@@ -126,6 +128,8 @@ int Run (MonoDevelopOptions options)
 			var args = options.RemainingArgs.ToArray ();
 
 			IdeTheme.InitializeGtk (BrandingService.ApplicationName, ref args);
+			IdeStartupTracker.StartupTracker.MarkSection ("GtkInitialization");
+
 
 			startupInfo = new StartupInfo (options, args);
 			if (startupInfo.HasFiles) {
@@ -143,14 +147,14 @@ int Run (MonoDevelopOptions options)
 				LoggingService.LogError ("Unauthorized access: " + ua.Message);
 				return 1;
 			}
+			IdeStartupTracker.StartupTracker.MarkSection ("IdeCustomizerInitialization");
 
 			try {
 				GLibLogging.Enabled = true;
 			} catch (Exception ex) {
 				LoggingService.LogError ("Error initialising GLib logging.", ex);
 			}
 
-			IdeStartupTracker.StartupTracker.MarkSection ("GtkInitialization");
 			LoggingService.LogInfo ("Using GTK+ {0}", IdeVersionInfo.GetGtkVersion ());
 
 			// XWT initialization