Docker, an open-source platform for packaging applications and dependencies into containers, faces challenges with slow build times, particularly for languages like Rust that compile to a single binary. This slowness is often due to large dependencies, inefficient caching, and hardware constraints. The article discusses how cargo-chef, a Cargo subcommand, optimizes Docker builds for Rust by enhancing caching capabilities, allowing for faster builds through the reuse of previously built layers. It introduces the use of Docker multistage builds and cargo-chef to streamline the build process by separating dependency compilation and final application builds into distinct stages. Despite its benefits, cargo-chef has limitations, such as requiring consistent working directories and not efficiently handling unchanged local dependencies. The article suggests leveraging Earthly for further optimization, particularly in continuous integration environments, as it offers significant speed improvements by using persistent build runners and efficient caching strategies.