Extend-O-Save Overhead Tester by John Eidsvoog & Charles F. Johnson shows how much processor time is consumed by your Extend-O-Save
modules. This may or may not be important to you. If you've ever
tried to do a download or printing operation and had a busy EOS
module kick in, you know that it can grind the operation to a halt,
resulting in an aborted download or a printout that never finishes.