When fishing for bass, to quickly change from one lure to the other i have tied a loop at the end of my line, i pass this loop through the hole of the lure and then over the lure and pull tight. If i need to put on another lure i just have to pull the line back over the lure and pull the line out and put the next lure on.
Is this advisable or should you always tie a knot and then when you want to change the lure, cut the lure off and tie the next lure on with a knot. Waste alot of line?