I’ve looked up a bunch of times where to download the so called “fast require” patch for Ruby. Every time that I install a new version, I have to look it up again. It’s very annoying.

You can also install the patch (and others) via RVM:

rvm reinstall 1.9.3 --patch railsexpress

If you haven’t read about this (now somewhat old) patch yet, read the story here.