Action Cable is one of the most attractive features in Rails 5 allowing us to build real-time applications with ease. That simplicity comes at a price:
First of all, Action Cable performance leaves much to be desired, especially for high-load applications.
Secondly, it’s Rails-only. And Ruby is not only Rails, isn’t it?
The project I’m working on, AnyCable, aims to solve the performance bottlenecks as long as bring cables to beyond-Rails world.