Efficiency vs. Performance — What's the Difference?

Efficiency is the (often measurable) ability to avoid wasting materials, energy, efforts, money, and time in doing something or in producing a desired result. In a more general sense, it is the ability to do things well, successfully, and without waste.

A performance is an act of staging or presenting a play, concert, or other form of entertainment. It is also defined as the action or process of carrying out or accomplishing an action, task, or function.

The quality or property of being efficient.

The act of performing or the state of being performed.

The degree to which this quality is exercised

The act or style of performing a work or role before an audience.

The ratio of the effective or useful output to the total input in any system.

The way in which someone or something functions

The ratio of the energy delivered by a machine to the energy supplied for its operation.

A presentation, especially a theatrical one, before an audience.

An efficiency apartment.

Something performed; an accomplishment.

The extent to which time is well used for the intended task.

(Linguistics) One's actual use of language in actual situations.

(dated) The quality of producing an effect or effects.

The act of performing; carrying into execution or action; execution; achievement; accomplishment; representation by action.

The extent to which a resource is used for the intended purpose; the ratio of useful work to energy expended.

That which is performed or accomplished; a thing done or carried through; an achievement; a deed; an act; a feat; especially, an action of an elaborate or public character.

(US) A one-room apartment.

(arts) A live show or concert.

The ratio of the output to the input of any system

The amount of useful work accomplished estimated in terms of time needed, resources used, etc.

Skillfulness in avoiding wasted time and effort;

(linguistics) The actual use of language in concrete situations by native speakers of a language, as opposed to the system of linguistic knowledge they possess (competence), cf. linguistic performance.

The act of performing; the carrying into execution or action; execution; achievement; accomplishment; representation by action; as, the performance of an undertaking of a duty.

That which is performed or accomplished; a thing done or carried through; an achievement; a deed; an act; a feat; esp., an action of an elaborate or public character.

A dramatic or musical entertainment;

The act of performing; of doing something successfully; using knowledge as distinguished from merely possessing it;

The act of presenting a play or a piece of music or other entertainment;

Process or manner of functioning or operating;

Any recognized accomplishment;