BabylonJS · bkaradzic-microsoft · Jun 11, 2026 · Jun 10, 2026
diff --git a/Apps/HeadlessScreenshotApp/Win32/App.cpp b/Apps/HeadlessScreenshotApp/Win32/App.cpp
@@ -93,12 +93,10 @@ int main()
 
     // Create the Babylon Native graphics device and update.
     auto device = CreateGraphicsDevice(d3dDevice.get());
-    auto deviceUpdate = device.GetUpdate("update");
 
     // Start rendering a frame to unblock the JavaScript from queuing graphics
     // commands.
     device.StartRenderingCurrentFrame();
-    deviceUpdate.Start();
 
     // Create a Babylon Native application runtime which hosts a JavaScript
     // engine on a new thread.
@@ -128,13 +126,11 @@ int main()
     winrt::com_ptr<ID3D11Texture2D> outputTexture = CreateD3DRenderTargetTexture(d3dDevice.get());
 
     // Close the script-load frame.
-    deviceUpdate.Finish();
     device.FinishRenderingCurrentFrame();
 
     // Open a new frame for `startup` so the JS-side resource creation and
     // startup() call run in the same frame as the wait that observes them.
     device.StartRenderingCurrentFrame();
-    deviceUpdate.Start();
 
     std::promise<void> startup{};
 
@@ -155,7 +151,6 @@ int main()
     startup.get_future().wait();
 
     // Close the startup frame.
-    deviceUpdate.Finish();
     device.FinishRenderingCurrentFrame();
 
     struct Asset
@@ -177,7 +172,6 @@ int main()
 
         // Start rendering a frame to unblock the JavaScript again.
         device.StartRenderingCurrentFrame();
-        deviceUpdate.Start();
 
         std::promise<void> loadAndRenderAsset{};
 
@@ -200,7 +194,6 @@ int main()
         loadAndRenderAsset.get_future().wait();
 
         // Finish rendering the frame.
-        deviceUpdate.Finish();
         device.FinishRenderingCurrentFrame();
 
         // Tell RenderDoc to stop capturing.

diff --git a/Apps/Playground/Android/BabylonNative/src/main/cpp/BabylonNativeJNI.cpp b/Apps/Playground/Android/BabylonNative/src/main/cpp/BabylonNativeJNI.cpp
@@ -167,10 +167,8 @@ extern "C"
     {
         if (appContext)
         {
-            appContext->DeviceUpdate().Finish();
             appContext->Device().FinishRenderingCurrentFrame();
             appContext->Device().StartRenderingCurrentFrame();
-            appContext->DeviceUpdate().Start();
         }
     }
 

diff --git a/Apps/Playground/Shared/AppContext.cpp b/Apps/Playground/Shared/AppContext.cpp
@@ -80,7 +80,6 @@ AppContext::AppContext(
     graphicsConfig.MSAASamples = 4;
 
     m_device.emplace(graphicsConfig);
-    m_deviceUpdate.emplace(m_device->GetUpdate("update"));
 
     // Mirror bgfx trace output (BgfxCallback::traceVargs) to debugLog so it
     // reaches stdout in headless mode, not just OutputDebugString.
@@ -89,7 +88,6 @@ AppContext::AppContext(
     Babylon::Plugins::ShaderCache::Enable();
 
     m_device->StartRenderingCurrentFrame();
-    m_deviceUpdate->Start();
 
     Babylon::AppRuntime::Options options{};
 
@@ -228,7 +226,6 @@ AppContext::~AppContext()
 {
     if (m_device)
     {
-        m_deviceUpdate->Finish();
         m_device->FinishRenderingCurrentFrame();
     }
 
@@ -238,6 +235,5 @@ AppContext::~AppContext()
     m_canvas.reset();
     m_input = {};
     m_runtime.reset();
-    m_deviceUpdate.reset();
     m_device.reset();
 }
diff --git a/Apps/Playground/Shared/AppContext.h b/Apps/Playground/Shared/AppContext.h
@@ -39,15 +39,13 @@ class AppContext
     AppContext& operator=(AppContext&&) noexcept = delete;
 
     Babylon::Graphics::Device& Device() { return *m_device; }
-    Babylon::Graphics::DeviceUpdate& DeviceUpdate() { return *m_deviceUpdate; }
     Babylon::AppRuntime& Runtime() { return *m_runtime; }
     Babylon::Polyfills::Canvas& Canvas() { return *m_canvas; }
     Babylon::Plugins::NativeInput* Input() { return m_input; }
     Babylon::ScriptLoader& ScriptLoader() { return *m_scriptLoader; }
 
 private:
     std::optional<Babylon::Graphics::Device> m_device;
-    std::optional<Babylon::Graphics::DeviceUpdate> m_deviceUpdate;
     std::optional<Babylon::AppRuntime> m_runtime;
     std::optional<Babylon::Polyfills::Canvas> m_canvas;
     Babylon::Plugins::NativeInput* m_input{};

diff --git a/Apps/Playground/UWP/App.cpp b/Apps/Playground/UWP/App.cpp
@@ -109,10 +109,8 @@ void App::Run()
     {
         if (m_appContext)
         {
-            m_appContext->DeviceUpdate().Finish();
             m_appContext->Device().FinishRenderingCurrentFrame();
             m_appContext->Device().StartRenderingCurrentFrame();
-            m_appContext->DeviceUpdate().Start();
         }
 
         CoreWindow::GetForCurrentThread().Dispatcher().ProcessEvents(CoreProcessEventsOption::ProcessAllIfPresent);
@@ -156,7 +154,6 @@ void App::OnSuspending(IInspectable const& /*sender*/, SuspendingEventArgs const
 
     if (m_appContext)
     {
-        m_appContext->DeviceUpdate().Finish();
         m_appContext->Device().FinishRenderingCurrentFrame();
 
         m_appContext->Runtime().Suspend();
@@ -175,7 +172,6 @@ void App::OnResuming(IInspectable const& /*sender*/, IInspectable const& /*args*
         m_appContext->Runtime().Resume();
 
         m_appContext->Device().StartRenderingCurrentFrame();
-        m_appContext->DeviceUpdate().Start();
     }
 }
 

diff --git a/Apps/Playground/Win32/App.cpp b/Apps/Playground/Win32/App.cpp
@@ -215,10 +215,8 @@ int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
         {
             if (appContext)
             {
-                appContext->DeviceUpdate().Finish();
                 appContext->Device().FinishRenderingCurrentFrame();
                 appContext->Device().StartRenderingCurrentFrame();
-                appContext->DeviceUpdate().Start();
             }
 
             result = PeekMessage(&msg, nullptr, 0, 0, PM_REMOVE) && msg.message != WM_QUIT;
@@ -340,7 +338,6 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
             {
                 if (appContext)
                 {
-                    appContext->DeviceUpdate().Finish();
                     appContext->Device().FinishRenderingCurrentFrame();
 
                     appContext->Runtime().Suspend();
@@ -359,7 +356,6 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
                         appContext->Runtime().Resume();
 
                         appContext->Device().StartRenderingCurrentFrame();
-                        appContext->DeviceUpdate().Start();
                     }
                 }
             }

diff --git a/Apps/Playground/X11/App.cpp b/Apps/Playground/X11/App.cpp
@@ -139,10 +139,8 @@ int main(int _argc, const char* const* _argv)
     {
         if (!XPending(display) && g_appContext)
         {
-            g_appContext->DeviceUpdate().Finish();
             g_appContext->Device().FinishRenderingCurrentFrame();
             g_appContext->Device().StartRenderingCurrentFrame();
-            g_appContext->DeviceUpdate().Start();
         }
         else
         {

diff --git a/Apps/Playground/iOS/LibNativeBridge.mm b/Apps/Playground/iOS/LibNativeBridge.mm
@@ -49,24 +49,20 @@ - (void)resize:(int)inWidth height:(int)inHeight
 {
     if (appContext)
     {
-        appContext->DeviceUpdate().Finish();
         appContext->Device().FinishRenderingCurrentFrame();
 
         appContext->Device().UpdateSize(static_cast<size_t>(inWidth), static_cast<size_t>(inHeight));
 
         appContext->Device().StartRenderingCurrentFrame();
-        appContext->DeviceUpdate().Start();
     }
 }
 
 - (void)render
 {
     if (appContext)
     {
-        appContext->DeviceUpdate().Finish();
         appContext->Device().FinishRenderingCurrentFrame();
         appContext->Device().StartRenderingCurrentFrame();
-        appContext->DeviceUpdate().Start();
     }
 }
 

diff --git a/Apps/Playground/macOS/ViewController.mm b/Apps/Playground/macOS/ViewController.mm
@@ -16,23 +16,19 @@ @implementation EngineView
 - (void)mtkView:(MTKView *)__unused view drawableSizeWillChange:(CGSize) size
 {
     if (appContext) {
-        appContext->DeviceUpdate().Finish();
         appContext->Device().FinishRenderingCurrentFrame();
 
         appContext->Device().UpdateSize(static_cast<size_t>(size.width), static_cast<size_t>(size.height));
 
         appContext->Device().StartRenderingCurrentFrame();
-        appContext->DeviceUpdate().Start();
     }
 }
 
 - (void)drawInMTKView:(MTKView *)__unused view
 {
     if (appContext) {
-        appContext->DeviceUpdate().Finish();
         appContext->Device().FinishRenderingCurrentFrame();
         appContext->Device().StartRenderingCurrentFrame();
-        appContext->DeviceUpdate().Start();
     }
 }
 

diff --git a/Apps/Playground/visionOS/LibNativeBridge.mm b/Apps/Playground/visionOS/LibNativeBridge.mm
@@ -37,13 +37,11 @@ - (bool)initializeWithWidth:(NSInteger)width height:(NSInteger)height {
 
 - (void)drawableWillChangeSizeWithWidth:(NSInteger)width height:(NSInteger)height {
     if (_appContext) {
-        _appContext->DeviceUpdate().Finish();
         _appContext->Device().FinishRenderingCurrentFrame();
 
         _appContext->Device().UpdateSize(static_cast<size_t>(width), static_cast<size_t>(height));
 
         _appContext->Device().StartRenderingCurrentFrame();
-        _appContext->DeviceUpdate().Start();
     }
 }
 
@@ -67,10 +65,8 @@ - (void)setTouchUp:(int)pointerId x:(int)inX y:(int)inY {
 
 - (void)render {
     if (_appContext && self.initialized) {
-        _appContext->DeviceUpdate().Finish();
         _appContext->Device().FinishRenderingCurrentFrame();
         _appContext->Device().StartRenderingCurrentFrame();
-        _appContext->DeviceUpdate().Start();
     }
 }
 

diff --git a/Apps/PrecompiledShaderTest/Source/App.cpp b/Apps/PrecompiledShaderTest/Source/App.cpp
@@ -103,12 +103,10 @@ int RunApp(
 
     // Create the Babylon Native graphics device and update.
     auto device = Babylon::Graphics::Device(config);
-    auto deviceUpdate = device.GetUpdate("update");
 
     // Start rendering a frame to unblock the JavaScript from queuing graphics
     // commands.
     device.StartRenderingCurrentFrame();
-    deviceUpdate.Start();
 
     // Create a Babylon Native application runtime which hosts a JavaScript
     // engine on a new thread.
@@ -136,13 +134,11 @@ int RunApp(
     loader.LoadScript("app:///index.js");
 
     // Close the script-load frame.
-    deviceUpdate.Finish();
     device.FinishRenderingCurrentFrame();
 
     // Open a new frame for `startup` so the JS-side resource creation and
     // startup() call run in the same frame as the wait that observes them.
     device.StartRenderingCurrentFrame();
-    deviceUpdate.Start();
 
     std::promise<void> startup{};
 
@@ -163,12 +159,10 @@ int RunApp(
     startup.get_future().wait();
 
     // Close the startup frame.
-    deviceUpdate.Finish();
     device.FinishRenderingCurrentFrame();
 
     // Start a new frame for rendering the scene.
     device.StartRenderingCurrentFrame();
-    deviceUpdate.Start();
 
     std::promise<void> renderScene{};
 
@@ -190,7 +184,6 @@ int RunApp(
     renderScene.get_future().wait();
 
     // Finish the frame.
-    deviceUpdate.Finish();
     device.FinishRenderingCurrentFrame();
 
     // Save the rendered output as a PNG.

diff --git a/Apps/StyleTransferApp/Win32/App.cpp b/Apps/StyleTransferApp/Win32/App.cpp
@@ -69,7 +69,6 @@ namespace
     WCHAR szWindowClass[MAX_LOADSTRING]; // the main window class name
 
     std::optional<Babylon::Graphics::Device> g_device{};
-    std::optional<Babylon::Graphics::DeviceUpdate> g_update{};
     Babylon::Plugins::NativeInput* g_nativeInput{};
     std::optional<Babylon::AppRuntime> g_runtime{};
     bool g_minimized{false};
@@ -219,13 +218,11 @@ namespace
     {
         if (g_device)
         {
-            g_update->Finish();
             g_device->FinishRenderingCurrentFrame();
         }
 
         g_nativeInput = {};
         g_runtime.reset();
-        g_update.reset();
         g_device.reset();
     }
 
@@ -300,12 +297,10 @@ int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
     // --------------------- Babylon Native initialization --------------------------
 
     g_device = CreateBabylonGraphicsDevice(d3d11Device.get());
-    g_update.emplace(g_device->GetUpdate("update"));
 
     // Start rendering a frame to unblock the JavaScript from queuing graphics
     // commands.
     g_device->StartRenderingCurrentFrame();
-    g_update->Start();
 
     // Create a Babylon Native application runtime which hosts a JavaScript
     // engine on a new thread.
@@ -335,13 +330,11 @@ int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
     loader.LoadScript("app:///Scripts/index.js");
 
     // Close the script-load frame.
-    g_update->Finish();
     g_device->FinishRenderingCurrentFrame();
 
     // Open a new frame for `startup` so the JS-side resource creation and
     // startup() call run in the same frame as the wait that observes them.
     g_device->StartRenderingCurrentFrame();
-    g_update->Start();
 
     std::promise<void> startup{};
 
@@ -362,7 +355,6 @@ int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
     startup.get_future().wait();
 
     // Close the startup frame.
-    g_update->Finish();
     g_device->FinishRenderingCurrentFrame();
 
     // --------------------------- Rendering loop -------------------------
@@ -372,7 +364,6 @@ int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
     MSG msg{};
 
     g_device->StartRenderingCurrentFrame();
-    g_update->Start();
 
     // Main message loop:
     while (msg.message != WM_QUIT)
@@ -388,7 +379,6 @@ int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
             if (g_device)
             {
                 // Finish Babylon Native rendering.
-                g_update->Finish();
                 g_device->FinishRenderingCurrentFrame();
 
                 if (g_selectedModel >= 0)
@@ -406,7 +396,6 @@ int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
                 // Present and start rendering next frame.
                 swapChain->Present(1, 0);
                 g_device->StartRenderingCurrentFrame();
-                g_update->Start();
             }
 
             result = PeekMessage(&msg, nullptr, 0, 0, PM_REMOVE) && msg.message != WM_QUIT;
@@ -460,7 +449,6 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
             {
                 if (g_device)
                 {
-                    g_update->Finish();
                     g_device->FinishRenderingCurrentFrame();
                 }
 
@@ -479,7 +467,6 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
                     if (g_device)
                     {
                         g_device->StartRenderingCurrentFrame();
-                        g_update->Start();
                     }
                 }
             }
@@ -601,4 +588,4 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
         }
     }
     return 0;
-}
+}