Application.LoadLevelAsync causes a huge spike

The spike happens right when I start the following coroutine:

Code (CSharp):

1. AsyncOperation asyncOp;
2.  
3. IEnumerator LoadLevelAsync(string levelToLoad)
4. {
5.     Application.backgroundLoadingPriority = ThreadPriority.Low;
6.     asyncOp = Application.LoadLevelAsync (levelToLoad);
7.     asyncOp.allowSceneActivation = false;
8.  
9.     yield return asyncOp;
10. }

Digging through the profiler the spike points to Loading.LockPersistentManager. It's as if the LoadLevelAsync tries to load on the main thread instead of the background thread. This happens in the Editor and on iOS, and Android devices. It's heaviest in the Editor though. I'm using Unity 4.6.3.f1. Is this a Unity bug or am I doing something wrong?

 

Anybody?

 

seem nobody knew it....

 

same problem with me

 

Reported this as a bug (#677082). Hopefully it'll be addressed soon.

 

+1 to this, we've just encountered a similar issue.

 

I've just experienced a similar issue with Unity5, but it also locks the editor.

 

I have same problem.

>Reported this as a bug (#677082). Hopefully it'll be addressed soon.

How can I access #677082 on Issue Tracker?

 

I have this problem too but it seems to be random.

Edit: Would be great if someone from Unity could explain why this is happening and how to make it stop.