Hi, On 5 Aug 2010, at 10:21, Stéphane Ducasse wrote: We have MooseAbstractGroup>>entities ^ self entityStorage elements EntityStorage that is a subclass of Collection. When we use MooseEntity>>entities, we possibly ask for some conversion (for example, before we converted to Array in RuntimeStorage) and this can be expensive. Instead, internally we should always go through the entityStorage to delegate to the EntityStorage and then rely on that implementation. Is that clearer? Doru -- www.tudorgirba.com "Be rather willing to give than demanding to get."

Hi, Sorry it was supposed to be MooseAbstractGroup>>entities instead of MooseEntity>>entities. As I said, this is implemented like: MooseAbstractGroup>>entities ^ self entityStorage elements This means that when I call entities, I do not get the entityStorage (which is the collection) but the internal implementation of it. Take a look at the following: MooseAbstractGroup>>asOrderedCollection ^ self entities asOrderedCollection This means that I first retrieve the elements and then I transform. So: - either we do not use entities but only entityStorage (at least internally), or - or we just make entities to return the storage. I would tend to go the second route, but I am not yet sure of the implications. Is this better? :) Doru -- www.tudorgirba.com "There are no old things, there are only old ways of looking at them."