def yardstick_config(extra_options = {})
      return options unless options[:config]

      yardstick_options = YAML.load_file(options[:config])
      yardstick_options.merge(extra_options)
    end
def yardstick_config(extra_options = {})
      return options unless options[:config]

      yardstick_options = YAML.load_file(options[:config])
      yardstick_options.merge(extra_options)
    end
Merge further options with yardstick config file.

 @api private
 @return [Hash] Hash of options for yardstick measurement