Phoenix Channels vs. Rails Action Cable

Written by Chris McCord the creator of Phoenix. His summary when comparing to Rails for real-time push notifications is below.

"... the sweet-spot for Action Cable today is small workloads with few subscribers on any given topic. Going beyond this means engineering efforts and resources must be spent on managing multiple nodes and optimizing code out of channels. Higher workloads with broadcasts to more than a few dozen subscribers risks availability. With Phoenix, we've shown that channels performance remains consistent as notification demand increases, which is essential for handling traffic spikes and avoiding overload."

Source code: https://github.com/chrismccord/channelsac