    # File lib/compass/compiler.rb, line 132
        def  compilecompile(sass_filename, css_filename)
          start_time = end_time = nil
          css_content = logger.red do
            timed do
              engine(sass_filename, css_filename).render
            end
          end
          duration = options[:time] ? "(#{(css_content.__duration * 1000).round / 1000.0}s)" : ""
          write_file(css_filename, css_content, options.merge(:force => true, :extra => duration))
          Compass.configuration.run_callback(:stylesheet_saved, css_filename)
        end