Author here. This is a good point. In this case we found it does slow down clean builds somewhat since we're pulling down + compiling Rust dependencies now as w

Author here. This is a good point. In this case we found it does slow down clean builds somewhat since we're pulling down + compiling Rust dependencies now as well as Elixir. While actually editing Elixir code I haven't experienced any noticeable slowdown for incremental builds - the Rust code is mostly static.