3 ms·
But if you have less intructions to run, you won't turn the machine on in the first place. And even if the machine is already on, giving it instructions to run
by progval 6y ago
But if you have less intructions to run, you won't turn the machine on in the first place.
And even if the machine is already on, giving it instructions to run will make it change the CPU frequency (DVFS), access the RAM, etc. which does increase its power usage.
- jeffbee 6y ago"access the RAM" is a big one that people overlook. Yes it might cost a few picojoules to load a line into cache, but the major cost of RAM is just that it exists and there is no low-power mode for refreshing it. RAM is incompressible and statically provisioned so if you can use memory more efficiently you can just buy less and this will save you a lot of power 24x7.