Ruby is a fast language, and a great one in so many ways, but nothing
in this world is truly free. It’s very easy to do things that seem
inconsequential but that later can bring your application to a
grinding halt.
Check out five important ways to avoid some of the most common
problems Rails apps encounter and keep your app running quickly.
OK, I finally noticed the link in your "subject" line ... that's not
the place I read carefully. I double-clicked on it to read the
message itself, where the link was not visible on my Google Groups
client.