gets the job done with little waste of time and energy

Producing a desired effect, product, etc. with minimum of effort, expense, or waste; working well.

Product ive, without waste. [D05176] SA-CMM

Minimizing waste or effort. Efficiency is distinguished from effectiveness. Rarely are efficiencies encouraged “at all costs”, instead being balanced with risk and cost. Efficiency is often the result of the continuous improvement of processes. Example: Only one file copy is required for each transaction; ensure that one copy is filed and then do not make the two back-up copies (neither an efficient use of time or resources). Be efficient as long as you do not compromise effectiveness.

Causing effects; producing results; that makes the effect to be what it is; actively operative; not inactive, slack, or incapable; characterized by energetic and useful activity; as, an efficient officer, power.

able to accomplish a purpose; functioning effectively; "people who will do nothing unless they get something out of it for themselves are often highly effective persons..."-G.B.Shaw; "effective personnel"; "an efficient secretary"; "the efficient cause of the revolution"

energetic 3/4

Capable; able to perform duties well producing a result.