Performance vs. Efficacy

Performance and Efficacy Definitions
Performance
The act of performing or the state of being performed.
Efficacy
Power or capacity to produce a desired effect; effectiveness.
Performance
The act or style of performing a work or role before an audience.
Efficacy
Ability to produce a desired effect under ideal testing conditions.
Performance
The way in which someone or something functions
The pilot rated the airplane's performance in high winds.
Efficacy
Degree of ability to produce a desired effect; effectiveness.
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Performance
A presentation, especially a theatrical one, before an audience.
Efficacy
Power to produce effects; operation or energy of an agent or force; production of the effect intended; as, the efficacy of medicine in counteracting disease; the efficacy of prayer.
Performance
Something performed; an accomplishment.
Efficacy
Capacity or power to produce a desired effect;
Concern about the safety and efficacy of the vaccine
Performance
(Linguistics) One's actual use of language in actual situations.
Performance
The act of performing; carrying into execution or action; execution; achievement; accomplishment; representation by action.
The performance of an undertaking or a duty
Though the result wasn't what we were hoping for, I have to commend the performance of the team, never giving up until the end.
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Performance
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.
Performance
(arts) A live show or concert.
The band played a mix of old and new songs during their 90-minute performance.
We saw the whole ballet performance from the front row.
Performance
The amount of useful work accomplished estimated in terms of time needed, resources used, etc.
Better performance means more work accomplished in shorter time and/or using fewer resources.
Performance
(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.
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.
Promises are not binding where the performance is impossible.
Performance
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.
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Performance
A dramatic or musical entertainment;
They listened to ten different performances
The play ran for 100 performances
The frequent performances of the symphony testify to its popularity
Performance
The act of performing; of doing something successfully; using knowledge as distinguished from merely possessing it;
They criticised his performance as mayor
Experience generally improves performance
Performance
The act of presenting a play or a piece of music or other entertainment;
We congratulated him on his performance at the rehearsal
An inspired performance of Mozart's C minor concerto
Performance
Process or manner of functioning or operating;
The power of its engine determine its operation
The plane's operation in high winds
They compared the cooking performance of each oven
The jet's performance conformed to high standards
Performance
Any recognized accomplishment;
They admired his performance under stress
When Roger Maris powered four home runs in one game his performance merits awe