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Iterating over all the objects in an ObjectGrid2D means iterating over every single cell in the array. If you don't have a lot of objects relative to the cells, this can be very slow, and it would make more sense to use a SparseGrid2D instead. You could use a double for-loop to go through all the objects. But elements() isn't too slow, and it's O(1). Sean On Oct 24, 2015, at 10:37 AM, Axel Kowald <[log in to unmask]> wrote: > Hello Together, > > I just wonder what the best way is to iterate over all the agent on my > ObjectGrid2D ? > Currently I'm extracting a Bag with all agents by using the elements() > method. It works, but I'm not sure how fast/slow it is. Would it be > worth to maintain my own Bag and do the bookkeeping by > inserting/removing agents when needed? > > thanx, > Axel