Gizmo performance

I’m using grid graph with 512x512 resolution. I have no problems with pathfinding, but with gizmo’s performance. When I want to connect manually two points, I need to show gizmos (or for scene review). But it’s horrible… It’s almost impossible to rotate or move over the scene. Do you any suggestion for this issue?
Thanks for this perfect project!

Sorry, I have not. Well, other than turning off Show Unwalkable Nodes in settings.

Thanks for fast reply! I’ll try it.
When I worked on some project in XNA, I had similar problem… Finally I made a mesh from these points and show it as wireframe.