类：Channel

¥Class: Channel

Channel 类代表数据管道中的一个单独的命名通道。它用于跟踪订阅者并在有订阅者时发布消息。它作为一个单独的对象存在，以避免在发布时进行通道查找，从而实现非常快的发布速度并允许大量使用，同时产生非常低的成本。通道是用 diagnostics_channel.channel(name) 创建的，不支持直接用 new Channel(name) 构建通道。

¥The class Channel represents an individual named channel within the data pipeline. It is used to track subscribers and to publish messages when there are subscribers present. It exists as a separate object to avoid channel lookups at publish time, enabling very fast publish speeds and allowing for heavy use while incurring very minimal cost. Channels are created with diagnostics_channel.channel(name), constructing a channel directly with new Channel(name) is not supported.