pub const MAX_NATIVE_ALIGN: usize = 16;Expand description
Strongest alignment served by picking a suitable class rather than by
over-allocating. Requests above this go to the GlobalAlloc shim’s
over-aligned path.
16 matters enough to be worth serving directly — u128, AtomicU64
pairs and most SIMD vectors ask for it — and it costs only skipping
to the next class when the natural one is not a multiple of 16.