When building it takes forever to process textures, why is that? (details inside)

I'm using Unity 2018 4.2 f1 and developing for Oculus Go, I followed all the tutorials when installing the SDK, applied settings to better performance and when switching to Android platform, it takes forever to process textures (literally the .png file).
I unchecked the process assets when importing and it was fine, but now that I want to build it takes forever.

Any advice to speed things up a bit? There are projects I have to delete because it takes too long to open.

 

It really does take forever. Like, more than an hour sometimes. But it should only have to do that once (or when switching platforms, which you will quickly stop doing). Just let it run over lunch or whatever, and then don't ever switch back.