FPS drop in game but editor is doing good using AnimationPlayer

Godot Version

4.3.dev4

Question

In my scene i have a bunch of animated models, the animation is played in the editor at around 450 fps, which is fine.


However when I run the game, the fps drop to 80 fps, as you can see in the upper left corner of the screen (I use Engine.get_frames_per_second() to display them).
I know that the drop is caused by the animation player, because when I deactivate it I get back to around 600 fps on both editor and in-game. The post-fx and environment settings in both my editor and in-game are the same. The effect disappear when I disable animations in game.

Does anybody have an idea on how to fix or optimize this ? Thanks a lot for reading and for potential help !

can you make an example so that I can also run it and test it?