[astrange]

iOS does sometimes swap, but only suspended processes, so you won't notice from inside the app.

[tinus_hn]

So how do you know? Is it documented somewhere? All I could find was one unclear mention that could also be about the automatic mechanisms built in to storyboards.

[astrange]

Probably not. It's patented though. https://patents.google.com/patent/US9720617B2/en