Yep, that's how I understand the word “performant” as well. A car that accelerates from 0-100 kph in under 3 seconds would be ”performant”. A car is “efficien

Yep, that's how I understand the word “performant” as well. A car that accelerates from 0-100 kph in under 3 seconds would be ”performant”. A car is “efficient” if it burns less than 4 liters of gasoline per 100 kilometers.