(Because it's like "racetrack", and it makes Rake tasks faster, and... oh, never mind.)
Tired of waiting for Ruby to spin up just so you can run a "routes" command, or your latest "db:migrate"?
Use rake-sh and start up a rake console for running tasks without the initial spin up. It'll take a "rake routes" from four seconds down to under a second. Rake task completion? Naturally. Use "t" for tasks, "! " (note there's a space after the bang) to run a shell command.
If you get a message about an "uninitialized constant Rake::DSL" when you run rake-sh, no sweat: add require 'rake/dsl_definition' to the top of your Rakefile.
Breaking flow sucks for developers: a few seconds doesn't sound like much. In actual time, it isn't much--but it's the distractions that kill, the times-between-doing. Keep them to a minimum by fully exploiting your tools.