OME and HTTP2/HTTP3/QUIC

[naanlizard]

I thought I had opened a discussion on this previously but apparently not

Recently, NGINX added support for both HTTP2 upstream connections (i.e. between NGINX and OME, when using NGINX as a (caching or not) reverse proxy) as well as HTTP3/QUIC connections between NGINX and clients.

For OME administrators, how does this affect us? I see that OME seems to support HTTP2 but there's not much information. There is slightly more in this release announcement for LLHLS.

1. Is it a major improvement in e.g. response times or throughput or reliability?
2. Are there any pitfalls to watch out for?
3. Do we expect HTTP2 to provide much improvement as the protocol between nginx and OME, or does it not matter much?
4. Is CPU usage expected to be higher with HTTP2 or 1.1?

As to HTTP3, I realize it's a bit tangential, but I think it's worth discussing here as well. Mostly I'm hoping someone has tried it out and gotten some data, otherwise perhaps I'll have to do it.