Complex sentence: Escalating to seven or fifteen such values will allow further levels at not much cost in storaaspbergersrated by much other activity, the computer's various storage control features will more or less automatically promote frequently accessed elements into faster storage.
Split into simpler sentences: Escalating to seven or fifteen such values will allow further levels at not much cost in storage. On the other hand, if the searches are frequent and not separated by much other activity, the computer's various storage control features will more or less automatically promote frequently accessed elements into faster storage.