We have this word "performant" in Romanian, too, it means something that performs well; it's not limited to IT parlance. I just checked and the French have it

We have this word "performant" in Romanian, too, it means something that performs well; it's not limited to IT parlance. I just checked and the French have it too, I can see how it has slowly made its way into English, through immigration and especially the Internet. A live language is always changing, resistance is futile. :)