Worst case on purpose: more actors than a busy town, every one billboarded and animating, on a
terrain chunk bigger than the screen. Rendered to a low-resolution buffer and upscaled
nearest-neighbour — the actual shipping technique, not a stand-in.
Pass bar: p95 ≥ 60fps on iPhone 15 Pro Max and Galaxy S25 Ultra.
Run it with the phone unplugged and not freshly charged — thermal state moves this number more
than any code change will.