there's a lot of arguments for and against this, but i think a lot of these don't matter, because many crates are already shipping prebuilt artifacts. ideally this could also be integrated with some sort of deterministic build system. the simplest implementation would be a per-crate (not per package) table that maps a target triple and a rust version (may be ignored for crates with a stable ABI or ones that are cli-only) to a hash and url for that crate's output. may need another layer of nes...
