### Godot version

v4.2.beta1.official [b1371806a]

### System information

Ubuntu 22.04.3 LTS 22.04 - X11 - GLES3 (Compatibility) - AMD Radeon RX 560 Series (polaris11, LLVM 15.0.7, DRM 3.42, 5.15.0-88-generic) () - AMD Ryzen 3 1200 Quad-Core Processor (4 Threads)

### Issue description

![image](https://github.com/godotengine/godot/assets/1330325/7a986599-5a68-42a4-beb1-5d3b4bf7db6b)
![image](https://github.com/godotengine/godot/assets/1330325/e8b8546b-b47b-4add-9567-7f70709ab03c)

Culling 3D goes bellow 60 fps even with just about 50 simple animated models. With v4.2.dev6.official [57a6813bb] many more models can be spawned without fps drop. However, both versions do show high cpu usage for culling 3D. Without animations there's barely any usage.

### Steps to reproduce

Spawn models with animation with the Compatibility renderer.

### Minimal reproduction project

[CullMRP.zip](https://github.com/godotengine/godot/files/13400514/CullMRP.zip)

actions.renames["NORMAL"] = "normal";
		actions.renames["NORMAL_MAP"] = "normal_map";
		actions.renames["NORMAL_MAP_DEPTH"] = "normal_map_depth";
		actions.renames["TEXTURE"] = "color_texture";
		actions.renames["TEXTURE_PIXEL_SIZE"] = "color_texture_pixel_size";
		actions.renames["NORMAL_TEXTURE"] = "normal_texture";
		actions.renames["SPECULAR_SHININESS_TEXTURE"] = "specular_texture";
		actions.renames["SPECULAR_SHININESS"] = "specular_shininess";
		actions.renames["SCREEN_UV"] = "screen_uv";
		actions.renames["SCREEN_PIXEL_SIZE"] = "screen_pixel_size";
		actions.renames["FRAGCOORD"] = "gl_FragCoord";
		actions.renames["POINT_COORD"] = "gl_PointCoord";
		actions.renames["INSTANCE_ID"] = "gl_InstanceID";
		actions.renames["VERTEX_ID"] = "gl_VertexID";
		actions.renames["LIGHT_POSITION"] = "light_position";
		actions.renames["LIGHT_DIRECTION"] = "light_direction";
		actions.renames["LIGHT_IS_DIRECTIONAL"] = "is_directional";
		actions.renames["LIGHT_COLOR"] = "light_color";
		actions.renames["LIGHT_ENERGY"] = "light_energy";
		actions.renames["LIGHT"] = "light";
		actions.renames["SHADOW_MODULATE"] = "shadow_modulate";
		actions.renames["texture_sdf"] = "texture_sdf";
		actions.renames["texture_sdf_normal"] = "texture_sdf_normal";
		actions.renames["sdf_to_screen_uv"] = "sdf_to_screen_uv";
		actions.renames["screen_uv_to_sdf"] = "screen_uv_to_sdf";
		actions.usage_defines["COLOR"] = "#define COLOR_USED\n";
		actions.usage_defines["SCREEN_UV"] = "#define SCREEN_UV_USED\n";
		actions.usage_defines["SCREEN_PIXEL_SIZE"] = "@SCREEN_UV";
		actions.usage_defines["NORMAL"] = "#define NORMAL_USED\n";
		actions.usage_defines["NORMAL_MAP"] = "#define NORMAL_MAP_USED\n";