With the new prefab improvements saving prefabs has become a huge issue for me. It takes over 20 seconds to save a prefab that has about 250 gameobjects in it and is used a handful of times in several scenes. This obviously makes Auto-Save not remotely viable and even just occasional saving has slowed down my workflow a lot compared to pre-2018.3. Is the performance still a work in progress? Are there things I can do to improve it?