I use a carpe iter 4b.
When i make 2 tracks with about 800 km together with 4 poi selected it needs about 30 seconds to load. The 2 tracks are a part of a 17 track tour of about 5200 km. I have the following maps activated Germany south, France South Switzerland and Spain.
When I leave all tracks visible it needs multiple Minutes but it still loads.
I found it important to activate only the maps and tracks I really need.