### 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)

return skeleton_owner.allocate_rid();
}
void MeshStorage::skeleton_initialize(RID p_rid) {
	skeleton_owner.initialize_rid(p_rid, Skeleton());
}
void MeshStorage::skeleton_free(RID p_rid) {
	_update_dirty_skeletons();
	skeleton_allocate_data(p_rid, 0);
	Skeleton *skeleton = skeleton_owner.get_or_null(p_rid);
	skeleton->dependency.deleted_notify(p_rid);
	skeleton_owner.free(p_rid);
}
void MeshStorage::_skeleton_make_dirty(Skeleton *skeleton) {
	if (!skeleton->dirty) {
		skeleton->dirty = true;
		skeleton->dirty_list = skeleton_dirty_list;
		skeleton_dirty_list = skeleton;
	}
}
void MeshStorage::skeleton_allocate_data(RID p_skeleton, int p_bones, bool p_2d_skeleton) {
	Skeleton *skeleton = skeleton_owner.get_or_null(p_skeleton);
	ERR_FAIL_NULL(skeleton);
	ERR_FAIL_COND(p_bones < 0);
	if (skeleton->size == p_bones && skeleton->use_2d == p_2d_skeleton) {
		return;
	}
	skeleton->size = p_bones;
	skeleton->use_2d = p_2d_skeleton;
	skeleton->height = (p_bones * (p_2d_skeleton ? 2 : 3)) / 256;
	if ((p_bones * (p_2d_skeleton ? 2 : 3)) % 256) {