Disable rails 4 asset log messages

gistfile1.rb

Rails::Rack::Logger.class_eval do

  def call_app(request, env)
    path = request.filtered_path
    unless path.index("/assets/") == 0
      # Put some space between requests in development logs.
      if development?
        logger.debug ''
        logger.debug ''
      end

      instrumenter = ActiveSupport::Notifications.instrumenter
      instrumenter.start 'request.action_dispatch', request: request
      logger.info started_request_message(request)
    end

    resp = @app.call(env)
    resp[2] = ::Rack::BodyProxy.new(resp[2]) { finish(request) }
    resp
  rescue
    finish(request)
    raise
  ensure
    ActiveSupport::LogSubscriber.flush_all!
  end

end