Added: Multicore-JIT back to help avoid I/O bottleneck after cold boot.

TheGershon · Jul 29, 2022 · 8b5fed4 · 8b5fed4
1 parent cd89921
commit 8b5fed4
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Showing 2 changed files with 30 additions and 1 deletion.
diff --git a/source/Reloaded.Mod.Launcher/App.xaml.cs b/source/Reloaded.Mod.Launcher/App.xaml.cs
@@ -1,4 +1,6 @@
-using static System.Environment;
+using System.Runtime;
+using static System.Environment;
+using Paths = Reloaded.Mod.Loader.IO.Paths;
 
 namespace Reloaded.Mod.Launcher;
 
@@ -36,6 +38,7 @@ private void OnStartup(object sender, StartupEventArgs e)
         }
 
         Application.Current.ShutdownMode = originalMode;
+        StartProfileOptimization();
     }
 
     private void SetupResources()
@@ -77,4 +80,29 @@ void TryAssignResource(string originalResource, string targetResource)
             Current.MainWindow.InvalidateVisual();
         }
     }
+
+    /// <summary>
+    /// Starts profile-optimization a.k.a. 'Multicore JIT'.
+    /// We're not actually using this for the async JIT but to load other DLLs on a background thread to avoid an I/O bottleneck.  
+    /// </summary>
+    public static void StartProfileOptimization()
+    {
+        // Start Profile Optimization
+        var profileRoot = Path.Combine(Paths.ConfigFolder, "ProfileOptimization");
+        Directory.CreateDirectory(profileRoot);
+
+        // Define the folder where to save the profile files.
+        ProfileOptimization.SetProfileRoot(profileRoot);
+
+        // Start profiling.
+        ProfileOptimization.StartProfile("Launcher-startup.profile");
+    }
+
+    /// <summary>
+    /// Finishes profile-optimization a.k.a. 'Multicore JIT'
+    /// </summary>
+    public static void StopProfileOptimization()
+    {
+        ProfileOptimization.StartProfile(null!);
+    }
 }
diff --git a/source/Reloaded.Mod.Launcher/Pages/SplashPage.xaml.cs b/source/Reloaded.Mod.Launcher/Pages/SplashPage.xaml.cs
@@ -34,6 +34,7 @@ private async void Load()
             await _setupApplicationTask;
             ChangeToMainPage();
             _ = Task.Run(ControllerSupport.Init);
+            App.StopProfileOptimization();
             DisplayFirstLaunchWarningIfNeeded();
         }
         catch (Exception ex)