high performance overhead from vk_ray_tracing_anyhit_KHR example

[jeremyg-lunarg]

https://github.com/nvpro-samples/vk_raytracing_tutorial_KHR/tree/master/ray_tracing__advance

The overhead is caused by descriptor indexing validation. On my laptop RTX4060 without validation this runs at hundreds of FPS. With descriptor indexing validation it runs at 5fps. Other GPU-AV options run at 50 fps or so which is usable.

[jeremyg-lunarg]

There are several other slow demos in the same project:

• vk_ray_tracing_gltf_KHR - 6.5 fps
• vk_ray_tracing_indirect_scissor_KHR - 5fps
• vk_ray_tracing_instances_KHR - 12 fps
• vk_ray_tracing_intersection_KHR - 15 fps
• vk_ray_tracing_motionblur_KHR - 8 fps