Uno Platform 6.6 Adds Native AOT, Vulkan Rendering, and Accessibility Improvements

Performance Enhancements with Native AOT

Uno Platform 6.6 now supports Native AOT (Ahead-of-Time) compilation across Android, iOS, Linux, macOS, and Windows. This compilation method processes application code before runtime, eliminating the need for JIT (Just-In-Time) compilation at startup. Tests on the Chefs sample application using .NET 10 showed startup improvements ranging from 21% on iOS to 61% on Android, though actual results will vary based on application specifics and deployment.

Vulkan Rendering Backend Integration

An opt-in Vulkan rendering backend has been introduced for Windows, Linux, and Android. While OpenGL remains the default Skia backend on these platforms, and Apple targets continue to use Metal, the Vulkan option can reduce per-frame rendering costs by up to 50% in certain scenarios. This makes it potentially beneficial for graphics-intensive or animation-heavy applications.

Simplified XAML Authoring and API Coverage

The release simplifies XAML development by implicitly making the standard WinUI presentation namespace and the x: namespace available. Developers can also centralize shared namespaces in a GlobalNamespaces.xaml file. Additionally, pages declaring x:Class can now automatically receive generated code-behind classes, allowing for XAML-only pages without requiring an empty .xaml.cs file, while manual code-behind remains an option for specific functionalities.

Enhanced AI-Assisted Development Support

Uno's App MCP (Model Context Protocol) and Docs MCP servers now feature automatic registration with supported development agents. The App MCP allows agents to inspect and interact with a running application, while the Docs MCP provides access to Uno documentation. This automatic registration is compatible with tools such as Visual Studio and VS Code Copilot, Claude Code, Cursor, Codex CLI, and Gemini CLI.