The article describes how they compared them for performance but didn't say which was better, and showed a graph which indicated that Rails 3 was worse for long

The article describes how they compared them for performance but didn't say which was better, and showed a graph which indicated that Rails 3 was worse for longer times in garbage collection for requests. I'd imagine that Rails 2 in GitHub would have been heavily optimized, but.... Is Rails 3 worse performing than Rails 2? Would some performance loss be okay if they had a better codebase?