I don't know if breadcrumbs is the right word. It is all the little tabs showing the depth of the code i.e.: "Declaration", "Function", "Code Section", "Block", "Code Section", etc.

You move the cursor and they changed and shows where you are at that point.

VIDEO : https://i.imgur.com/VJVLoFo.mp4

That video shows what I meant. At the beginning I move the cursor with the mouse. It is fast and the redrawing is quick.
I go back to the starting point, and I move the cursor with the arrow keys (Keyboard). I move fast down and you can see the cursor stops, the breadcrumbs redrawing continues and then the cursor jumps to another line.

Can that performance improve?