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Parallel load-testing, fast like a bullet.

Bullet specifically target at Heroku-deploy Cedar environment.

Bullet use Parallel internally to manage threads and run mechanize/webrat tasks that load-test your website.

How to use the command (not ready)

bullet will look for a bullet.yml in the current directory, use github plan (details explained in .yml structure), use 10 rambos (dynos). Each dyno will spawn 10 processes/threads, and take specs from spec/performance

bullet --aim github --machine 10 --gun 10 spec/performance

How to use in Ruby

By default, Bullet will look for .rb files inside guns folder in the current directory. You can specify the folder with load

Once all bullets are ready, you can fire it

require 'bullet'

Bullet(:machine => 10, :gun => 10).load('bullet.yml').use("spec/performance").aim('github').fire

Config template

    register: 10
    create_repo: 100

This will use user/register_spec.rb and user/create_repo_spec.rb from specified folder i.e spec/performance


Daniel, Dao Quang Minh (

Contributing to Bullet

  • Check out the latest master to make sure the feature hasn't been implemented or the bug hasn't been fixed yet
  • Check out the issue tracker to make sure someone already hasn't requested it and/or contributed it
  • Fork the project
  • Start a feature/bugfix branch
  • Commit and push until you are happy with your contribution
  • Make sure to add tests for it. This is important so I don't break it in a future version unintentionally.
  • Please try not to mess with the Rakefile, version, or history. If you want to have your own version, or is otherwise necessary, that is fine, but please isolate to its own commit so I can cherry-pick around it.


Copyright (c) 2011 dqminh. See LICENSE.txt for further details.