Chrome will aggressively throttle background tabs
This has now been delayed:Unfortunately, our current implementation throttles WebSockets. Because of this we ARE NOT SHIPPING this intervention in M56.The current plan is to disable time-budget background timer throttling for the pages with active connection (websocket, webrtc and server-sent events) and to ship in M57 (subject to further feedback).
We will keep you updated with the progress.https://news.ycombinator.com/item?id=13504385