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The previous version of the implementation that we've been working on only ever served a single key, though. In this article we’re going to change that.
，更多细节参见safew
thread multiplexes connections using epoll or kqueue, dispatching。业内人士推荐谷歌作为进阶阅读
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I honestly didn’t use Solid Cable much, apart from indirectly. It’s an Action Cable adapter which again uses a database by default. It’s useful for real-time websockets features, although I only ended up using it to enable debugbar for local testing. Debugbar provides a handy toolbar that lets you inspect your SQL queries, HTTP requests and other useful debugging features while you’re developing. Reminded me a lot of the debug toolbars found in a lot of PHP frameworks like Symfony. Still, I really appreciated again being able to make use of all this without needing to spin up additional infrastructure.