Addressable async loading causing Unity to freeze

Unity Engine
,
1

Hello there,
I’m trying to pre-load a bunch of addressable prefabs during gameplay phases, so that when the player reaches a new level he won’t have to wait for the assets to load. Each chapter is made with about 20 prefabs
However I can’t manage to load the assets in the background without freezing the game.

I have tried using asset.LoadAssetAsync(), Addressables.LoadAssetsAsync, from the Start or inside a coroutine. It keeps freezing the game and I can’t find a solution for that. It feels like the LoadAsync is still trying to load each asset in a single frame, can’t we do this in another thread?

Thank you

2

Can you post a full code example of how you load these into memory? Have you tried async code?

3

Sure, here is what I have now (loading async of the assetReferences):

[SerializeField] private AssetReferenceGameObject[] _assetsToPreload;
[SerializeField] private UnityEvent _preloadingEnded;

public void LoadAssets()
{
    StartCoroutine(PreloadAssetsRoutine());
}

private IEnumerator PreloadAssetsRoutine()
{
    AsyncOperationHandle handleInit = Addressables.InitializeAsync();
    yield return handleInit;

    if (handleInit.Status == AsyncOperationStatus.Succeeded)
    {
        int loadedCount = 0;
        foreach (var asset in _assetsToPreload)
        {
            AsyncOperationHandle<GameObject> handle = asset.LoadAssetAsync<GameObject>();
            yield return handle;
            if (handle.Status == AsyncOperationStatus.Succeeded)
            {
                loadedCount++;
            }
            else
            {
                Debug.LogError("Failed to load asset: " + asset.RuntimeKey);
            }
        }

        if (loadedCount == _assetsToPreload.Count())
        {
            _preloadingEnded?.Invoke();
        }
    }
    else
    {
        Debug.LogError("Failed to initialize Addressables.");
    }
}

And here is another thing that I tried without coroutines:

public void LoadAssets()
{
    Addressables.InitializeAsync().Completed += LoadingReady;
}

private void LoadingReady(AsyncOperationHandle<IResourceLocator> handle)
{
    Addressables.LoadAssetsAsync<GameObject>("ChapterLabel", null);
}

I also tried setting Application.backgroundLoadingPriority = ThreadPriority.Low;

4

Any update on this? We are also having this issue. Pretty much same code as above. Waiting for Addressables.InitializeAsync to complete causes a massive hitch.

5

No need to use addressable. LoadSceneAsync freeze in Unity 6. I tested it with 6000.0.34, 6000.0.38,
6000.1.0b. The game in editor freeze until the download is done.
Same code works flawlessly with unity 2022.3.44.

private void MyLoad()
{
    StartCoroutine(MyLoadCo());
}

private IEnumerator MyLoadCo()
{
    AsyncOperation asyncOperation = SceneManager.LoadSceneAsync(SceneIndex);
    asyncOperation.allowSceneActivation = false;
    while (!asyncOperation.isDone)
    {
        //Output the current progress
        Debug.Log(asyncOperation.progress);
        m_Text.text = (asyncOperation.progress * 100) + "%";

        // Check if the load has finished
        if (asyncOperation.progress >= 0.9f)
        {
            //Change the Text to show the Scene is ready
            m_Text.text = "Press the space bar to continue";
            //Wait to you press the space key to activate the Scene
            if (Input.GetKeyDown(KeyCode.Space))
                //Activate the Scene
                asyncOperation.allowSceneActivation = true;
        }

        yield return null;
    }
}