[dochtman]

Is TCP + TLS still faster than QUIC, or do you mean TCP without encryption? (I'm assuming you're using Quinn with rustls, so encryption is always enabled.)

I'm also curious about your macOS vs Linux numbers. As a Quinn maintainer, we're always happy to hear feedback including about our performance!

[spetz]

Right, I meant TCP without TLS, and when it comes to QUIC I only did benchmark using the "dangerous" mode (disabled local cert validation). I don't have the exact numbers, but AFAIR on MacOS raw TCP was a few times faster than QUIC, while on Linux (e.g. PopOS distro) TCP was maybe around 20-30% faster?

Still, there are plenty of options to be configured in Quinn (buffer size, send/receive window etc.), so it might be that with some tweaking the performance would be similar or QUIC would be even faster than TCP - this is also one of the things that I'd like to spend more time with in the future. We expose most of these options in the server configuration file, so it's easy to adjust.

Thank you for contributing to such a great library, really easy to work with :)