Note that Rust's "clippy" linter has a `trivially_copy_pass_by_ref` lint which recommends changing by-reference to by-copy for sufficiently small structs, but p

Note that Rust's "clippy" linter has a `trivially_copy_pass_by_ref` lint which recommends changing by-reference to by-copy for sufficiently small structs, but presumably it's aiming to be conservative. AIUI it recommends by-copy for structs of at most 8 bytes because it thinks that's the appropriate limit for 32-bit targets, and they don't like the set of warnings issued to change too much for different targets.