Question fixedupdate more jittery than update

hi
so i'm using the charactercontrolller component. when i put the movement script in update it's perfectly smooth, but in fixedupdate it's more jittery. It's not much but it's noticeable.
I think it's to do with time.deltatime, which i don't know much about (I do change it to fixeddeltatime when i put it in fixed update though)
How do i fix this
thank you

Code (CSharp):

1. public class Controller : MonoBehaviour
2. {
3.     [SerializeField] [Range(1, 10)] private float speed;
4.     private CharacterController controller;
5.  
6.     private void Awake() {
7.         controller = GetComponent<CharacterController>();
8.     }
9.  
10.     private void Update() {
11.        
12.     }
13.  
14.     private void FixedUpdate() {
15.         Vector2 move = new Vector2(Input.GetAxis("Horizontal"), Input.GetAxis("Vertical"));
16.         controller.Move(move * Time.fixedDeltaTime * speed);
17.     }
18. }

 

You must be experiencing this jittery movement from some point of view. This movement is probably for the player, but what is your game view? First person? Third person? Side Scroller? How is your camera being manipulated?

Just as some general info:

Update occurs every frame, while FixedUpdate fires off every fixed time step. Since a fixed time step is longer than a frame, there are more frames than there are fixed time steps in any given time. The more frames there are, the smoother something will look like it is moving, just like conventional animation. This however does not entirely explain why you are observed, obvious jittery movement, we will need the the info I am asking about above.

FixedUpdate is for physics, basically anything related to Rigidbody. You are however using CharacterController, which isn't involved with physics directly. You should not be using fixed update for what you have presented in your code. What are you attempting that led you to do this?