Very slow start up on 2017.1.2p2

I’ve updated my game from Unity 5.6.x to 2017.1.2p2 but the boot up performance is terrible. After the Unity splash screen has completed, it can take up to 3 minutes to load my first scene, where previously it was seconds.

The device I’m using isn’t the best (Moto G 2012), but the game runs fine on previous versions of Unity - the only change is to 2017.1.2

Not sure where to start looking to resolve this…

Please submit a bugreport and share your case number!

Updated to 2017.2 and this is fixed. I found some mention of an issue with resources loading that was resolved in 2017.2 and its much faster… just had to re-write some code and move any transforms out of Awake() until 2017.2.0p1 is released