How many rake tasks can be run at once in rails?

What is the best way to speed up rake's load time of the Rails environment?

• #=>    rake environment  7.67s user 0.63s system 95% cpu 8.704 total. it's annoying that it takes a lot time when you want to run a task. eg. `rails g controller x`, `rake db:migrate`

• Answer:

  I got mine down from 20s to 9s by putting require => false on libraries in the Gemfile that didn't need to be loaded, and by optimizing my routes (was able to reduce it by 20 routes (a little under half of what is was).