Prevent Rails 3.1 (webrick?) from logging assets rendering

There is an open ticket for this https://github.com/rails/rails/issues/2639, when it is closed and you have the lastest and greatest, in config/environments/development.rb add:

config.assets.logger = nil

Until the above issues is resolve, then this will work:

Rails.application.assets.logger = Logger.new('/dev/null')
Rails::Rack::Logger.class_eval do
  def before_dispatch_with_quiet_assets(env)
    before_dispatch_without_quiet_assets(env) unless env['PATH_INFO'].index("/assets/") == 0
  end
  alias_method_chain :before_dispatch, :quiet_assets
end

Reference: How to disable logging of asset pipeline (sprockets) messages in Rails 3.1?