Sometime trying it for real is giving thousand of words. It's not about performance, but

Here's something:

1. Documentations in their manpage is very complete. That includes manpage for configuration like `httpd.conf`

2. Has numbers of tools in it already. OpenSSH, OpenSMTPD, OpenHTTPd, Relayd, Pf (firewall), acme-client

3. And there are more than just that. You could try discover it by your own.