Definition of performant in English:

performant

adjective

Computing
  • Functioning well or as expected.

    ‘a highly performant database which is easy to use’

noun

rare
  • A person who performs a duty or ceremony.

Origin

Early 19th century (as noun): from perform + -ant; the adjective dates from the 1980s.

Pronunciation

performant

/pəˈfɔːmənt/