/ pəˈfɔːmə(r); NAmE pərˈfɔːrm-/ noun
1.
a person who performs for an audience in a show, concert, etc. :
a brilliant / polished / seasoned performer
2.
a person or thing that behaves or works in the way mentioned :
He was a poor performer at school and left with no qualifications.
VW is the star performer of the motor industry this year.