The renderer is GPU-bound, but Bevy's CPU path (resource management,
system scheduling, egui, wgpu command submission) still benefits from
cross-crate inlining. Cargo's default release profile skips LTO and
splits codegen across 16 units, leaving inter-crate trampolines through
Bevy/wgpu in the hot path.
- lto = "fat": whole-program cross-crate inlining.
- codegen-units = 1: best optimization (slower compiles, accepted).
- panic = "abort": smaller binary, no unwind tables.
- strip = "symbols": drop debug symbols from the shipped binary.
wasm-release inherits release then overrides opt-level to "z", so web
builds keep their size focus. Release build verified; cargo test green
(14 passed).
