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Question by Rukas90 · Sep 24, 2017 at 03:08 PM · performancecoroutineinvokerepeating

InvokeRepeating VS Coroutines [Performance]

Hello everyone.

I was wondering, what is better to use InvokeRepeating or Coroutines? I want to optimize my scripts and instead of calling stuff every frame per seconds inside the Update() function only call the specific function for example every 0.25f seconds. So I decided to use either InvokeRepeating or Coroutines. But I don't know what is better in terms of performance. I wrote couple of simple script. Which example is more optimized?

InvokeRepeating:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class CameraReposition : MonoBehaviour {
 
     [SerializeField] private Camera[] cameras;
     [SerializeField] private Transform pos;
 
     public bool forceRePosition;
 
     void Start ()
     {
         InvokeRepeating("ForceRePosition", 0f, 0.2f);
     }
     
     void ForceRePosition ()
     {
         if (!forceRePosition) return;
         cameras[0].gameObject.transform.position = pos.position;
         cameras[1].gameObject.transform.position = pos.position;
     }
 }

Coroutines:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class CameraReposition : MonoBehaviour {
 
     [SerializeField] private Camera[] cameras;
     [SerializeField] private Transform pos;
     [SerializeField] private float WaitTime = 0.2f;
 
     public bool forceRePosition;
 
     void Start ()
     {
         StartCoroutine(ForceRePosition(WaitTime));
     }
     
     IEnumerator ForceRePosition (float waitTime)
     {
         while (forceRePosition)
         {
             yield return new WaitForSeconds(waitTime);
 
             RePosition();
         }
     }
 
     public void RePosition ()
     {
         cameras[0].gameObject.transform.position = pos.position;
         cameras[1].gameObject.transform.position = pos.position;
     }
 }




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Best Answer

Answer by TheSOULDev · Sep 24, 2017 at 03:49 PM

While invoke repeating is slightly better than coroutines for something static, you should use a coroutine to control a state machine instead so you have as few function calls creating garbage as you can.

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