gem cleanup

This is a reminder to uninstall unused gems for each of the Ruby versions you have installed. Switch to the desired Ruby version and run

gem cleanup

This uninstalls unused versions of gems that are installed. I’m not sure how Ruby determines which gems are not in-use, but it’s handy because the different gem versions installed really add up. Run this command every few months. I don’t remember the last time I did this but I freed up like 3+GB of storage today just cleaning up gems.