关键在于循环和网络套接字需要大量管理代码，这样才能监听、更新和控制不同的连接和接口。

The key is that the loop and network sockets need a lot of management code to ensure that you are listening, updating, and controlling the different connections and interfaces.

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而不足之处在于对网络延迟和基于云的开发平台的风险(如云故障)管理缺乏控制。

Disadvantages include lack of control over network latency and managing the risks of a cloud-based development platform such as cloud outages.

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PaaS 提供商：提供商至少要控制操作系统、硬件、网络基础架构和资源管理。

PaaS provider: At a minimum, the provider controls operating systems, hardware, network infrastructure, and resource management.

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