O noticed that in 4.5, RSM step takes about 10ms(!!) for LPV. I don’t know what is exactly included in it (only generating RSM, light injection, etc)m but that’s just way to much.
Porpagate step is another 5ms.
In the end, it’s about 15ms, for GI, that doesn’t look that good to begin with, where light propagation have short distance, thus producing artifacts, and in which specular reflections are not as good as, as with cone traced solution.
That being said, technique have it merits, but there is something broken in current release, and it could be really changed to use voxelized scene repesentation for better results, as I posted before.