per·form·er 
/pɚˈfoɚmɚ/ noun
plural per·form·ers /pɚˈfoɚmɚ/ noun [count] 1 : a person (such as an actor or a musician) who acts, sings, dances, etc., for an audience
▪ The new actress joining the troupe is a seasoned performer. 2 : someone or something that works, functions, or behaves in a particular way : someone or something that performs well or badly
▪ The top five performers of the sales team will receive a bonus. ▪ The computer is a good performer at a reasonable price. ▪ This stock has been a poor performer.
▪ The new actress joining the troupe is a seasoned performer.
▪ The top five performers of the sales team will receive a bonus. ▪ The computer is a good performer at a reasonable price. ▪ This stock has been a poor performer.
