Task.Delay is not working as it should

[Hitoruna]

I am having a problem with some code which uses Task.Delay. I am probably using it bad because when I try it to wait 2 ms (1000 times) it waits completely different times

My code is

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;




#if !UNITY_EDITOR && UNITY_WSA


using System.Threading.Tasks;


#endif




public class ExampleScript : MonoBehaviour {


    // Use this for initialization

    void Start () {
        Debug.Log("Start():: Starting");
        
#if !UNITY_EDITOR && UNITY_WSA


      //  Task.Run( ()=>SlowJob()   );
        
         Task.Run( async ()=>SlowJob()   ); //Should I put async here?


        //SlowJob();


#endif
        Debug.Log("Start():: Done");
    }
    






    void SlowJob()
    {
        Debug.Log("ExampleScript::SlowJob()  --Doing 1000 things , each taking 2ms");


        System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();
        sw.Start();




        for(int i=0;i<1000;i++)
        {


#if !UNITY_EDITOR && UNITY_WSA


        //This will require to declare SlowJob to be async 
         //  await Task.Delay(2);


        //We use a way that is NOT recommended by experts so we have to be aware of this
       // Task.Delay(2).Wait();


       //How about this
            WaitFor2MiliSeconds();
#endif








        }


        sw.Stop();


        Debug.Log("ExampleScript::SlowJob() --Done! Elapsed Time:" + sw.ElapsedMilliseconds / 1000f);






    }








#if !UNITY_EDITOR && UNITY_WSA
     private async void WaitFor2MiliSeconds()
    {
 //        await System.Threading.Tasks.Task.Delay(2);
         await System.Threading.Tasks.Task.Delay(TimeSpan.FromMilliseconds(2.0));
    
     }


#endif


}

Yes, it is a code for Unity for the Hololens but it uses C#

So when I use Task.Delay(2).Wait the code that should take 2 seconds takes 15 seconds

When I use await.Task.Delay() in the WaitFor2MiliSeconds() function the code that should take 2 seconds takes 0.2 seconds if synchronous or 0.4 if asynchronous

What should I modify in order to wait only 2ms (therefore the fucntion SlowJob taking only 2 seconds)

I will greatly appreciate any help here

 

[JohnH]

Here you'll find two different code examples and an explanation about millisecond presicion: Task.Delay Method (Int32) (System.Threading.Tasks)