Translation of "performance" into English

Tom considérait la performance de Marie comme très mauvaise.

Tom doesn't think that Mary's performance was very good.

Et c'est comme ça que m'est venue l'idée d'ouvrir un institut des arts immatériels de la performance.

And this is how, for me, was born the idea to have an institute of immaterial performing arts.

Cependant, l'approche proposée permet d'obtenir de meilleures performances de détection.

However, the proposed approach may achieve a better detection performance.