As someone who uses Nix and direnv to manage development environments, the additional speed will be nice for me. I don't need rv to supply a Ruby for me at all,

As someone who uses Nix and direnv to manage development environments, the additional speed will be nice for me. I don't need rv to supply a Ruby for me at all, but just a really fast Bundler would be nice. My environment reasserts that the correct things are installed every time I change into the directory. A no-op Bundle install takes a couple hundred milliseconds, which is not great for something you want to run constantly and automatically. Getting that down to tens of milliseconds will be really nice for me!