搞个全局变量存啊

ps: 文体两开花？

https://github.com/mperham/sidekiq/wiki/Advanced-Options

class HardWorker
  include Sidekiq::Worker

  MEMCACHED_POOL = ConnectionPool.new(size: 10, timeout: 3) { Dalli::Client.new }
  def perform(args)
    MEMCACHED_POOL.with do |dalli|
      dalli.set('foo', 'bar')
    end
  end
end

多谢啦