rails quiet assets silent assets rails console rails server output

Gemfile.md

# Quiet Assets
group :development do
  gem 'webrick', '~> 1.3.1'
end

quiet_assets.md

# config/initializers/quiet_assets.rb
# http://stackoverflow.com/a/7508407/1180523
if Rails.env.development?
  Rails.application.assets.logger = Logger.new('/dev/null')
  Rails::Rack::Logger.class_eval do
    def call_with_quiet_assets(env)
      previous_level = Rails.logger.level
      Rails.logger.level = Logger::ERROR if env['PATH_INFO'] =~ %r{^/assets/}
      call_without_quiet_assets(env)
    ensure
      Rails.logger.level = previous_level
    end
    alias_method_chain :call, :quiet_assets
  end
end

Make sure to run bundle install and then restart rails s for changes to take effect