有人可以帮助我提高这段代码的效率吗？

I'm creating a skill tree calculator for a game. I wrote a method that checks whether or not it can subtract a point from the skill and then proceeds to do so. Everything is working as it should, however it's very slow when this method is executed in rapid succession (i.e. when 5 points are subtract at the same time). I'm creating a skill tree calculator for a game