This is generally only required if the compiler cannot automatically release the compiler modules - this is the case if the module body contain anonymous functions (because we don’t know if they wen’t used for spawning processes or stored somewhere). I don’t think it’s required for fastglobal.
EDIT: I’ve just checked the fastglobal code and it compiles the data modules using Erlang compiler and not the elixir one, so it does not affect it in any way.
