if this tree left like this, could there be a problem for the player?
I’m assuming you mean framerate?
That depends entirely on the rest of your project. It is possible to have a tree like that in your game and not have too much framerate drop if most of the objects in your game aren’t too heavy.
that’s right, framerate… I understand, that is what I wanted to know, now I am calmer with your answer, thank you very much for answering, you have helped me 
sorry about my english.