======From Gemini:
Rendering hundreds of real-time animated controls requires minimizing GPU draw calls, avoiding offscreen framebuffers, and keeping memory bandwidth low.
The Best Rendering Approaches
For a large UI with real-time updates, QQuickItem + QSGGeometryNode or SDF (Signed Distance Field) Custom Shaders are the best approaches.
QQuickItem + QSGGeometryNode (Recommended)
Why: You build custom vertex geometry directly on CPU/GPU buffers. Because Qt’s scene graph automatically batches nodes that share materials and textures, rendering 100+ dials/sliders can be compressed into very few draw calls.
When to use: Great for sharp, vector-like geometry (e.g., dial ticks, slider tracks, simple needles).
