Bug AR Foundation add reference images at runtime causes memory leak on iOS, but works fine on Android.

I want to add 500 reference images at runtime, for now I'm adding up to 250. This goes well on android, but not for iOS. Memory usage goes up to 1.6 GB until the app crashes.

Standard memory usage for my app is around 300 MB with lots of dynamic image thumbnails (approx. count 300) and other stuff.

After adding 250 reference images, runtime memory usage goes up to around 0.55GB on Android, but for the same scenario it goes up to 1.6GB on iOS and then the app crashes.

Unity version: 2021.1.19f1
AR Foundation: 4.2.2
Android: Motorola One Fusion+ (Android 11, 6GB)
iPhone: iPhone XR (iOS 15.0.2, 3GB)

I'm adding the code snippet below, any help will be appreciated, thanks in advance.

Code (CSharp):

1.  
2. private void Start()
3. {
4.     //Other codes...
5.     StartCoroutine(AddToLibrary(mutableLibrary, true));
6. }
7. private IEnumerator AddToLibrary(MutableRuntimeReferenceImageLibrary mutableLibrary, bool wait)
8. {
9.     foreach (var item in markers)
10.     {
11.         using (UnityWebRequest unityWebRequest = UnityWebRequestTexture.GetTexture(item.Value))
12.         {
13.             yield return unityWebRequest.SendWebRequest();
14.             if (unityWebRequest.result != UnityWebRequest.Result.Success)
15.             {
16.                 Debug.LogError(unityWebRequest.error);
17.             }
18.             else
19.             {
20.                 Texture2D texture2D = DownloadHandlerTexture.GetContent(unityWebRequest);
21.                 if (texture2D && imageManager && mutableLibrary != null)
22.                 {
23.                     var jobState = mutableLibrary.ScheduleAddImageWithValidationJob(texture2D, item.Key, 1);
24.                     yield return new WaitWhile(() => wait && !jobState.jobHandle.IsCompleted);  //Optional wait
25.                     Destroy(texture2D);
26.                 }
27.             }
28.         }
29.         yield return new WaitForEndOfFrame();
30.     }
31. }

 

I recommend trying unity 2021.3 LTS (no big reason to stay on 2021 tech stream rn), update all AR tools like AR foundation, arkit, etc om the package manager if possible, then test again.

If the probably still occurs file a bug report. Since you're on the newest LTS they should be handles fairly quickly

 

Hey @SoumyadeepSen Please share full code i wanna try this !

 

Has anyone gotten dynamic registering of ARTrackable images to work, in any version of ARFoundation? / @SoumyadeepSen

Tested using a Coroutine like above, but even after Yielding until after the Add job completion, the library tracked image count is still 0.
[Bug] ScheduleAddImageWithValidationJob does not add images to a library · Issue #1024 · Unity-Technologies/arfoundation-samples (github.com)

 

anyone managed to fix it?

 

@WyattBUnity It says session tracking but my problem is that once i run ScheduleAddImageWithValidationJob it crashes. I dont even know if it adds the image (i wanna create runtime targets so i take a camera frame as a target)

Code (CSharp):

1.     void Start()
2.     {
3.         library = m_TrackedImageManager.CreateRuntimeLibrary();
4.         m_TrackedImageManager.trackedImagesChanged += OnChanged;
5.     }
6.  
7.     void Update()
8.     {
9.         if (Input.GetMouseButtonUp(0))
10.             if (library is MutableRuntimeReferenceImageLibrary mutableLibrary)
11.                 mutableLibrary.ScheduleAddImageWithValidationJob((Texture2D)Camera.main.GetComponent<ARCameraBackground>().material.GetTexture("_MainTex"), "my new image", 0.1f);
12.     }