Change a few readings.
Keep the rest of the work.
A building has 64 sensors, eight racks and two rooms. Change the readings and compare two ways to update the same rack, room and building totals.
Choose what changes
Each row is one rack. Select readings to change.
3 of 64 readings selected
Next: change each selected reading by 7 units.
Room A: racks 1–4. Room B: racks 5–8.
Recalculate everything
Read the new inputs. Rebuild every total.
—rollup calculationsReuse previous work
Update affected totals. Keep the others.
—rollup calculationsReady to compare
Choose a change, then apply the update.
Result check
Starting totals shown. Apply an update to check both paths.
This browser illustration uses ordinary sums and synthetic readings to explain reuse. Counts cover rollup calculations; identifying changes, reading inputs and verifying results also take work. These are illustrative work counts, not measured product speedups or energy savings.