| One day a Rubyist came to Koichi and said, "I understand how to improve | CRuby's performance. We must use a generational garbage collector." Koichi | patiently told the Rubyist the following story: "One day a Rubyist came | to Koichi and said, 'I understand how to improve CRuby's performance..." | [This story is an homage of an introduction in a paper: | "A real-time garbage collector based on