diff --git a/src/AcDream.App/Rendering/GameWindow.cs b/src/AcDream.App/Rendering/GameWindow.cs
index 5d62d63..02cf52c 100644
--- a/src/AcDream.App/Rendering/GameWindow.cs
+++ b/src/AcDream.App/Rendering/GameWindow.cs
@@ -135,7 +135,7 @@ public sealed class GameWindow : IDisposable
                 ContextProfile.Core,
                 ContextFlags.ForwardCompatible,
                 new APIVersion(4, 3)),
-            VSync = true,
+            VSync = false,  // off during development so the perf overlay shows true framerate
         };
 
         _window = Window.Create(options);