Vulkan: Heavy 3D scene (25M+ primitive indices) performs significantly slower in 4.0 compared to 3.5 #68959
Description
Godot version
4.0 beta 5 & 3.5.1 stable
System information
Windows 11, Vulkan, GTX 1050 Ti 526.98
Issue description
The Stable release seems to run on avg about twice as fast as the 4.0 across various identical scenes, using only the features that are the same among the two branches (so no mesh lod, no ssao, ssr, occlusion culling or anything like that, just meshes and lights with no effects)
in the MRPs provided below, the converted and adjusted to match the original with 4.0 is getting 30-34 FPS depending on the renderer used @ 100% gpu utilization, while 3.5 is getting 60 fps @ 85% gpu utilization
Steps to reproduce
Test the Same Scenes across 3.5 and 4.0