3.22.0

Flutter 3.22 delivers major performance gains through WebAssembly stabilization, Impeller's feature-complete Vulkan backend on Android, and significant iOS platform view optimizations. The release introduces streamlined development workflows with WidgetState, flavor-conditional assets, and Vertex AI Firebase integration, while enforcing stricter Android build dependency version requirements and completing the v1 embedding removal.

Highlights

• WebAssembly now stable on web with 2-3x frame rendering improvements
• Impeller Vulkan backend feature complete on Android with full blur and shader support
• Blur performance reimplemented, reducing CPU and GPU time by nearly 50%
• Stencil-then-Cover rendering strategy reduces complex path rasterization by 10x
• iOS platform view performance improved: 50% GPU reduction, 33% faster frame rendering
• WidgetState API moved outside Material for broader framework access
• Flavor-conditional asset bundling and asset transformation via Dart packages
• Vertex AI for Firebase Dart SDK preview with Gemini API integration
• Deep link validator tool enhanced with Android manifest verification