[UNet] Best practice to cache components in NetworkBehaviour

In single player game I used to cache components in Awake or Start for my own comfort (and performance). Like that

 private SpriteRenderer _renderer;
 void Start()
 {
     _renderer = GetComponent<SpriteRenderer>();
 }

Problem is: in NetworkBehaviour I have OnStartClient, OnStartServer, OnStartLocalPlayer. And nowhere in script reference is stated how it chains with Awake and Start. So where should I cache my components?

I cannot do that in both OnStartClient and OnStartServer because in local match both of them are triggered.