17. The one or more non-transitory computer-readable storage media of claim 16 , wherein the list is updated based at least in part on a threshold of changes that have been made to the field.
17. The one or more non-transitory computer-readable storage media of claim 16 , wherein the list is updated based at least in part on a threshold of changes that have been made to the field. 18. The one or more non-transitory computer-readable storage media of claim 17 , wherein the list is updated by at least recalculating discrete values that represent the range of the field.