2 minutes I'm waiting Rhino to recover from extending a surface

Yes, it’s a trimmed surface.

It used to be a stable function but since it’s possible to pick a point dynamically it regularly blocks me in my workflow, because I made the mistake of using the function on a surface too complex and Rhino just can’t handle displaying the change dynamically at a frame rate higher than 0.5FPS.

finally decided it would be quicker to force quit Rhino from the task manager and redo the work from the last save

Hello- please post an example surface or send to tech@mcneel.com with a link back here in your comments.