AF447 had no performance problem.
By itself, it did not. If aroplane is too heavy or air is too warm for the altitude you want to fly at, you simply fly lower and that's it.
When the autopilot and AT failed with the UAS they pulled back for some reason and stalled causing the crash.
We are not discussing Corsair, Super Stinker, Marganski Swift or Phantom, fine machines that can be flicked but airliners and they can't be. When stable and not very maneuverable aeroplane stalls, it more often than not is performance related i.e. running out of speed. AF447 was no exemption. They tried to pull her where she was just incapable of going. Like 727 at Stony point or 757 at Puerto plata.
Anyway, did the incident we're discussing here happen at all? I can't find anything except ASNwiki and strangely, Avherald lists completely unrelated incident for the registration and date.