Oh, sure, it's kinda a pipe dream to get something like this for C++ (use ccache instead). But Rust is still forming its story here (we have experimental increm

Oh, sure, it's kinda a pipe dream to get something like this for C++ (use ccache instead). But Rust is still forming its story here (we have experimental incremental compilation which does this!) and I see no reason to constrain it by tying it to files :)