When I read the papers, I sometimes see the phrases energy saving and energy savings. I don't understand how they are different. Compare these sentences:
1) However, the maximum energy saving obtained by the OTMR scheme depends on appropriate speed setting for the processing units, which in turn is determined by the system power characteristics.
2) As we discussed earlier, the processing speed for the ﬁrst two processing units in OTMR systems is critical in energy savings.
3) However, if it is possible to reduce the voltage at all by running slower, then there will be a net energy savings per cycle.
How are they different?