I am using Rails 3.0.1, Bundler 1.0.3 and Ruby 1.9.2p0 (2010-08-18 revision 29036). Everything was fine and fast until I started adding Devise & Omniauth. From that on everything involving initializing Bundler (calling Bundler.require as in application.rb) took ages (by means of 30-50 seconds which is a lot for e.g. calling 'rake routes').
The time is lost in 'config/application.rb':
Bundler.require(:default, Rails.env) if defined?(Bundler)
I tried to disable / enable gems (like the ones I added last or all test-related gems) but it seems as if it is an issue involving a barrier of the amount of total gems rather than any specific coding problems in certain gems.
For final testing I created a fresh Rails 3.0.1 Project with a new RVM gemset and added the gems one by one. Still the same at around 30-50 gems (which is not unusual for large projects and has never before been an issue).
Any ideas (besides: decreasing your gem count)?