The memory usage easily exceeds 2GB and can reach the magic number that crashes a 32bit application on Windows.
I see that I am not the only one experiencing this. I am using the recommended optimizations and I have tried different modes (static, dynamic). The graphics are added to a GraphicsOverlay and I am using a renderer to define symbolization (v10.2.7 / v100.0 / v100.1).
Will this issue be improved upon in a forthcoming release?