baihezhuo commented on issue #1585: RMQ 4.2.0 - 4.5.2 [TIMEOUT_CLEAN_QUEUE] URL: https://github.com/apache/rocketmq/issues/1585#issuecomment-552419980 > > > @baihezhuo 可以试下，这个[PR](https://github.com/apache/rocketmq/pull/1516)对同步双写的性能做了较为明显的提升，你可以验证一下，欢迎给出反馈。 大致看了一下这个PR ，大体就是对consumer端的ack做了异步化处理（之前是同步的）这样理论上会给broker请求处理线程让出更多的资源，blockingqueue排队处理的更快。 那我是不是可以先把consumer端关闭，仅做producer端发送的测试，理论上结果肯定比修PR里修改的性能要高；但是实际上还是存在被流控的问题。。。
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