A new way to understand your Rails app's performance

Is your Rails app slow?

When it takes seconds to load what should be a simple view, you have a problem worth digging into.

You could have too many database calls or some slow methods. Or maybe it’s that speedup loop someone put in your code and forgot about.

You can find lots of tools to help you find out what’s slowing your app down. A few weeks ago, I talked about rbtrace. New Relic’s rpm gem has also helped me speed up my apps.

But my favorite tool for exploring performance problems does a...