On 25/09/17 7:35 PM, Grzegorz Junka wrote: > Fair enough, I missed that you can set ordered_set in ETS, but > nevertheless it won't work with maps. However, even if I use ETS the Key > is still stored twice, isn't? (once as the key for ordered_set, once as > the value when the Id is the key). And you care about this why?