### 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)

}
			}
			glBindVertexArray(0);
			glBindBuffer(GL_ARRAY_BUFFER, 0);
		}
		glBindVertexArray(0);
		glBindBuffer(GL_ARRAY_BUFFER, 0);
	}
	if (mesh->surface_count == 0) {
		mesh->aabb = new_surface.aabb;
	} else {
		mesh->aabb.merge_with(new_surface.aabb);
	}
	mesh->skeleton_aabb_version = 0;
	s->material = new_surface.material;
	mesh->surfaces = (Mesh::Surface **)memrealloc(mesh->surfaces, sizeof(Mesh::Surface *) * (mesh->surface_count + 1));
	mesh->surfaces[mesh->surface_count] = s;
	mesh->surface_count++;
	for (MeshInstance *mi : mesh->instances) {
		_mesh_instance_add_surface(mi, mesh, mesh->surface_count - 1);
	}
	mesh->dependency.changed_notify(Dependency::DEPENDENCY_CHANGED_MESH);
	for (Mesh *E : mesh->shadow_owners) {
		Mesh *shadow_owner = E;
		shadow_owner->shadow_mesh = RID();
		shadow_owner->dependency.changed_notify(Dependency::DEPENDENCY_CHANGED_MESH);
	}
	mesh->material_cache.clear();
}
int MeshStorage::mesh_get_blend_shape_count(RID p_mesh) const {