I want to understand the difference between lroh and libp2p

[ISensuiI]

I have been using libp2p to build my applications for about 6 months. It is very complex, with many concepts and modules. Including requestresponse, gossipsub, kad, swarm, relay, hole punch, mdns, substream, quic, etc. I just saw the relevant introduction on redit. I have read the manual and have a basic understanding, but I still want to ask the relevant developers

1. What is the difference between it and libp2p? I have a preliminary understanding that lroh is mainly used to build data transmission between devices. In fact, I am more concerned about whether it has functions or features that libp2p does not have.

2. How is its transmission performance compared with lib2p rust. (If there is a comparison, please tell me)

3. How is its transmission performance compared with webrtc rs (If there is a comparison, please tell me)

I am sorry to ask a couple of questions about other libraries, but my next project, about two months later, will use these libraries including lroh, libp2p webrtc rs, and the general direction is real-time remote control software similar to teamview But it is mainly used for remote control of games, including picture, sound and remote control, so I try to understand the performance of these libraries as much as possible in advance. If the developers can answer a few questions for me, it will be very grateful.

[matheus23]

I have been using libp2p to build my applications for about 6 months. It is very complex, with many concepts and modules.
[...]
What is the difference between it and libp2p?
[...]
I am more concerned about whether it has functions or features that libp2p does not have.

Generally, we've put a lot of effort into making iroh "peer to peer connections that just work".
This means we've kept the scope small: There's no DHT, swarm, or gossipsub. At least none of that is in iroh directly, but they're implemented as protocols on top, see e.g. iroh-gossip which provides gossipsub-like functionality.
I don't think there are many functions that iroh has that libp2p doesn't, it's just that we believe all of the features we do have work better. The iroh project was founded from developers who were deeply involved with libp2p, frustrated with its shortcomings and complexity and wanted to build something better.

How is its transmission performance compared with lib2p rust. (If there is a comparison, please tell me)

That's highly dependent on the actual libp2p transport that you're using, and with each transport come trade-offs.
rust-libp2p's QUIC transport uses quinn, just like iroh does. So once the connection is established, the performance should be close to identical.
It's likely you'll get better throughput with a TCP transport in libp2p, though, because that transport would likely use a kernel-space implementation (at least that's what we've noticed), but you'd lose all of the good feature that come with QUIC, and at the end of the day, if you're running in home networks, you should still be able to saturate the usual 1gbps that these networks have.
We don't have benchmarks to compare these numbers. We mostly track iroh performance on our performance dashboard https://perf.iroh.computer.

How is its transmission performance compared with webrtc rs (If there is a comparison, please tell me)

We haven't run a comparison for that yet. That said, we've had some folks who are running iroh on millions of mobile phones report that it's roughly twice as performant as webrtc. Unfortunately, that's the best I can tell you right now and it's mostly word-by-mouth, we don't have the numbers ourselves.

If you manage to get some numbers, we'd be excited to see what you end up with.

the general direction is real-time remote control software similar to teamview But it is mainly used for remote control of games, including picture, sound and remote control

One of our earliest adopters was the shaga team, they've built something like that with iroh, so it's definitely fits what iroh was made for.

[ISensuiI]

Thank you very much for your prompt reply. Although libp2p is also very good, I was actually very painful in the learning stage because it is too large, complex, and there are almost no complete examples. Although I have mastered most of the functions now, my application is almost complete. But if I want to let new people join the team, it will be very difficult. There is no way to start work quickly.
Your reply gave me a new understanding of iroh. Thank you for letting me know Shaga. What they do is great and very similar to my ideas. Recently, I will learn about iroh myself.

There is one more thing I want to add. I want to know more about projects built with lroh and related knowledge. In addition to searching in the current library, is there any other way?
I tried to search on Google, but all I found were our youtube videos about Iroh. There are not many articles or videos about the project.

[matheus23]

Iroh is a fairly new project (compare this to e.g. libp2p which has been around for... 10+ years? vs. iroh in its current form has been in development for ~2 years).
We're working hard on spreading the word.
The next best thing is probably the awesome list: https://github.com/n0-computer/awesome-iroh
Feel free to PR your project when you get there. The website also has some examples of projects that use iroh: DeltaChat, Shaga and some that the website doesn't mention yet like rave.io or Nous Research.