Rust: release build - LayerX Research

Rust: release build

WIP

references

https://doc.rust-lang.org/book/ch14-01-release-profiles.html

https://qiita.com/sile/items/e9d331b3b06565728d1d

https://keens.github.io/blog/2017/12/18/rustnobainarigaookiiriyuu/

https://qnighy.hatenablog.com/entry/2017/05/02/070000