> The Caddy forum thread I linked to above highlighted a Tweet about Caddy being 20X more performant than nginx.

That's just saying Caddy _can_ be faster, it's not saying Caddy _is always_ faster. That was never claimed.

> when I just wanted to know how Caddy compares to nginx in the most broad terms

But that's impossible. There's no way to "generally" benchmark a web server. There's just way too many ways it can be used for any single benchmark to ever be valid.

Do your own benchmarks, for _your_ usecase. That's the only way you'll get any kind of real answer.