What if the brain is highly efficient? To be more specific, there are several
interconnected key measures of efficiency for physical learning machines:* energy efficiency in ops/J
* spatial efficiency in ops/mm^2 or ops/mm^3
* speed efficiency in time/delay for key learned tasks
* circuit/compute efficiency in size and steps for key low level algorithmic
tasks [1]
* learning/data efficiency in samples/observations/bits required to achieve a
level of circuit efficiency, o…