Does the engine trimming sprites speed it up, or just save space?
> Both
Also, the first question: The game does not use lights. Does the selection of the Rendering Path in the Player Settings for iOS have any impact on the performance of the game? Or is the rendering path only used by unity's renderer, not yours?
> Use vertex lit, that should work well. Forward will work fine too, as long as you don't have any lights in the scene. We don't have a bespoke renderer.