Shape edited elements may contain many points. This may impact performance. Turn off preview of points on pre-highlight and selection of a shape edited element.
Set the display of control points to your preference or turn off the display of points if you experience performance issues.
Turning the display of points off, you will lose the functionality of tab-selecting points/edges and making adjustments adjusting outside of the Editing Mode. When an element is selected and you enter into the Modify Sub-element mode, the points will be shown and will be editable. The option only controls the visibility of points during highlight and selection.