Will Argo Smart Routing reduce the latency of the data transfered over websocket connection? Or the only thing it will do is make a faster connection time?
Theoretically it should improve all instances of latency between Cloudflare’s POP and your origin, actually I don’t know if it gets applied to websockets.
If you’d like a concrete answer, try contacting support https://support.cloudflare.com/hc/en-us/requests/new and they will likely be able to confirm. I do see that on the Argo Tunnel developer page that tunnel does support Websockets, so I don’t see why regular Argo wouldn’t.