How Unity call it's MonoBehaviour Method or Events like Update

 Ever wonder how the magic events of unity Behavior works:

void Awake()

{

 

}

 

void Start()

{

 

}

 

void Update()

{

}

// Or other unity magic events like OnEnable, OnDisable, Late Update, Fixed Update, etc.,

The simple answer comes into mind that maybe unity use reflections to find Mono Behaviour methods in order to call it every time or maybe they use override to those methods but apparently, this is not happening. So how it calls its event especially the Update event that calls on every frame.

The way unity3d Messaging system works its:

1.      Unity scripting runtime Mono or IL2CPP access MonoBehaviour derived (type) script.

2.      Look for magic events and cache it.

3.      Like if a MonoBehaviour derived script has an update event then the script will be added into a list (list of scripts) that will be updated on every frame.

4.      Now during gameplay, unity iterates over the list and fire the Unity events. This is the reason that if you make your event public or private they don’t get effected.