Hi, When I look at the code of OrderedCollection>>removeAll from de Squeak- Web image I see: removeAll "remove all elements quickly" self become: OrderedCollection new It seem to me that is not a fast way of removing all element of the collection. I would rather do: removeAll self setCollection: (Array new: self size) I do not see the #removeAll method in other image and by looking at the sender it seem that is aida who use it. Mth