Feedback HDRP DXR garbage and performance

I have spend days and days optimizing my own code on the pursuit for my desired framerate at 60fps but I am really running out of corners to cut. When I peak at the Profiler it is frustrating to see how much is eaten up by HDRP and DXR. I am sure the DXR team is doing their best, but I just hope they would pay more attention to performance.

In my project (2023.2.0a16), HDRP+DXR is generating 1.6kb of garbage per frame.



It seems to be the methods related to ray tracing.


Especially ray traced reflections.


Is it really necessary to generate this much garbage? The measurements are from the Editor and I understand the numbers are different in builds, but still, performance in the Editor is important as well.

I don't know if it makes a difference, but I have a mesh that is being updated by a compute shader using vertex buffer GPU access. The MeshRenderer RayTracingMode is set to DynamicGeometry, so this means a RayTracingAccelerationStructure is being build in the background. Could it be that this part needs love and attention?

In the last screenshot above you can see that things related to denoising SSR also generates garbage. This puzzles me since I disabled denoising for SSR.