BobCad can help you reduce the number of entities using the Cleanup/Optimize feature. I've copied the help menu for you here. This should reduce the number of entities in the file, thus providing a smoother toolpath. Hope this helps you:
Cleanup / Optimize
Purpose: to reduce the number of entities within a drawing by joining contiguous selected segments that have the same X/Y/Z angle or share a common center point and radius into a single entity.
Use: The selectable entity types for this function are lines, arcs, and splines. The user is permitted to use the single selection, window selection, and chain selection methods with this function.
Gary