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Caddy is written in Go, and make use of native fibers/green threads/goroutines.

Also has builtin letsencrypt automation and generally easier configuration, so for small sites it might be a better option than nginx.

I think their docs says that unless you expect to scale to multiple x 10 000 requests / second then it caddy might be worth trying.

I went with it for the test networks at my job and liked it a lot.

And then when you do, you can use Nginx to reverse proxy N Caddy instances!

It's also slow