Merge pull request #1412 from peppy/startup-load-improvements

Improve startup load times by sequentially loading components

osu.Desktop/OsuGameDesktop.cs

@@ -12,15 +12,12 @@ using osu.Desktop.Overlays;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Platform;
 using osu.Game;
-using osu.Game.Screens.Menu;
 using OpenTK.Input;
 
 namespace osu.Desktop
 {
     internal class OsuGameDesktop : OsuGame
     {
-        private VersionManager versionManager;
-
         public OsuGameDesktop(string[] args = null)
             : base(args)
         {
@@ -82,16 +79,11 @@ namespace osu.Desktop
         {
             base.LoadComplete();
 
-            LoadComponentAsync(versionManager = new VersionManager { Depth = int.MinValue });
+            LoadComponentAsync(new VersionManager { Depth = int.MinValue }, v =>
-
-            ScreenChanged += s =>
             {
-                if (s is Intro && s.ChildScreen == null)
+                Add(v);
-                {
+                v.State = Visibility.Visible;
-                    Add(versionManager);
+            });
-                    versionManager.State = Visibility.Visible;
-                }
-            };
         }
 
         public override void SetHost(GameHost host)

osu.Game/OsuGame.cs

@@ -157,40 +157,49 @@ namespace osu.Game
             BeatmapManager.PostNotification = n => notificationOverlay?.Post(n);
             BeatmapManager.GetStableStorage = GetStorageForStableInstall;
 
-            AddRange(new Drawable[] {
+            AddRange(new Drawable[]
+            {
                 new VolumeControlReceptor
                 {
                     RelativeSizeAxes = Axes.Both,
                     ActionRequested = action => volume.Adjust(action)
                 },
-                mainContent = new Container
+                mainContent = new Container { RelativeSizeAxes = Axes.Both },
-                {
+                overlayContent = new Container { RelativeSizeAxes = Axes.Both, Depth = float.MinValue },
-                    RelativeSizeAxes = Axes.Both,
-                },
-                volume = new VolumeControl(),
-                overlayContent = new Container { RelativeSizeAxes = Axes.Both },
-                new OnScreenDisplay(),
             });
 
-            LoadComponentAsync(screenStack = new Loader(), d =>
+            loadComponentSingleFile(screenStack = new Loader(), d =>
             {
                 screenStack.ModePushed += screenAdded;
                 screenStack.Exited += screenRemoved;
                 mainContent.Add(screenStack);
             });
 
+            loadComponentSingleFile(Toolbar = new Toolbar
+            {
+                Depth = -5,
+                OnHome = delegate
+                {
+                    hideAllOverlays();
+                    intro?.ChildScreen?.MakeCurrent();
+                },
+            }, overlayContent.Add);
+
+            loadComponentSingleFile(volume = new VolumeControl(), AddInternal);
+            loadComponentSingleFile(new OnScreenDisplay(), AddInternal);
+
             //overlay elements
-            LoadComponentAsync(direct = new DirectOverlay { Depth = -1 }, mainContent.Add);
+            loadComponentSingleFile(direct = new DirectOverlay { Depth = -1 }, mainContent.Add);
-            LoadComponentAsync(social = new SocialOverlay { Depth = -1 }, mainContent.Add);
+            loadComponentSingleFile(social = new SocialOverlay { Depth = -1 }, mainContent.Add);
-            LoadComponentAsync(chat = new ChatOverlay { Depth = -1 }, mainContent.Add);
+            loadComponentSingleFile(chat = new ChatOverlay { Depth = -1 }, mainContent.Add);
-            LoadComponentAsync(settings = new MainSettings
+            loadComponentSingleFile(settings = new MainSettings
             {
                 GetToolbarHeight = () => ToolbarOffset,
                 Depth = -1
             }, overlayContent.Add);
-            LoadComponentAsync(userProfile = new UserProfileOverlay { Depth = -2 }, mainContent.Add);
+            loadComponentSingleFile(userProfile = new UserProfileOverlay { Depth = -2 }, mainContent.Add);
-            LoadComponentAsync(beatmapSetOverlay = new BeatmapSetOverlay { Depth = -3 }, mainContent.Add);
+            loadComponentSingleFile(beatmapSetOverlay = new BeatmapSetOverlay { Depth = -3 }, mainContent.Add);
-            LoadComponentAsync(musicController = new MusicController
+            loadComponentSingleFile(musicController = new MusicController
             {
                 Depth = -4,
                 Position = new Vector2(0, Toolbar.HEIGHT),
@@ -198,16 +207,16 @@ namespace osu.Game
                 Origin = Anchor.TopRight,
             }, overlayContent.Add);
 
-            LoadComponentAsync(notificationOverlay = new NotificationOverlay
+            loadComponentSingleFile(notificationOverlay = new NotificationOverlay
             {
                 Depth = -4,
                 Anchor = Anchor.TopRight,
                 Origin = Anchor.TopRight,
             }, overlayContent.Add);
 
-            LoadComponentAsync(dialogOverlay = new DialogOverlay
+            loadComponentSingleFile(dialogOverlay = new DialogOverlay
             {
-                Depth = -5,
+                Depth = -6,
             }, overlayContent.Add);
 
             Logger.NewEntry += entry =>
@@ -246,16 +255,6 @@ namespace osu.Game
                 };
             }
 
-            LoadComponentAsync(Toolbar = new Toolbar
-            {
-                Depth = -4,
-                OnHome = delegate
-                {
-                    hideAllOverlays();
-                    intro?.ChildScreen?.MakeCurrent();
-                },
-            }, overlayContent.Add);
-
             settings.StateChanged += delegate
             {
                 switch (settings.State)
@@ -272,6 +271,17 @@ namespace osu.Game
             Cursor.State = Visibility.Hidden;
         }
 
+        private Task asyncLoadStream;
+
+        private void loadComponentSingleFile<T>(T d, Action<T> add)
+            where T : Drawable
+        {
+            // schedule is here to ensure that all component loads are done after LoadComplete is run (and thus all dependencies are cached).
+            // with some better organisation of LoadComplete to do construction and dependency caching in one step, followed by calls to loadComponentSingleFile,
+            // we could avoid the need for scheduling altogether.
+            Schedule(() => { asyncLoadStream = asyncLoadStream?.ContinueWith(t => LoadComponentAsync(d, add).Wait()) ?? LoadComponentAsync(d, add); });
+        }
+
         public bool OnPressed(GlobalAction action)
         {
             if (intro == null) return false;

osu.Game/Overlays/Toolbar/ToolbarUserArea.cs

@@ -1,6 +1,7 @@
 // Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
+using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Primitives;
@@ -11,11 +12,12 @@ namespace osu.Game.Overlays.Toolbar
     internal class ToolbarUserArea : Container
     {
         public LoginOverlay LoginOverlay;
-        private readonly ToolbarUserButton button;
+        private ToolbarUserButton button;
 
         public override RectangleF BoundingBox => button.BoundingBox;
 
-        public ToolbarUserArea()
+        [BackgroundDependencyLoader]
+        private void load()
         {
             RelativeSizeAxes = Axes.Y;
             AutoSizeAxes = Axes.X;