Four lines of Caddyfile come out of the adapter as 46 lines of pretty-printed JSON, a ratio just over eleven to one [7]. Those lines are decisions taken on your behalf: the server gets named `srv0`, the handlers are wrapped in a `subroute`, and the file server carries `"hide": ["./Caddyfile"]` so it will not serve its own config [6]. That name, `srv0`, is generated by the adapter, not written by a person.
The three disagree about whether the file you edit is the authority. nginx checks prefix locations first and keeps the longest, then tries regular expression locations in the order they appear and takes the first that matches, falling back to the kept prefix if none do; `^~` on the longest prefix skips the regex pass and `=` stops the search outright [12]. Caddy mostly ignores file order, because the adapter sorts HTTP handler directives into a fixed built-in order and breaks ties between same-name directives by matcher specificity, with only a `route` block preserving what you wrote [10]. Apache is ordered within a group and not across groups, so a `<Location>` block applies after a `<Directory>` block wherever you put it, and `<Directory>` sections merge shortest path first [13][9].
The sort has a documented edge. Plugin directives are not in Caddy's built-in order, so each one needs a position set through the `order` global option or a `route` wrapper [11]. That automatic sort covers only the directives that shipped in the build; anything added by a plugin has to be placed by hand.
The nine lines of the worked Caddy config contain no certificate path, no redirect block and nothing that sets the forwarded headers; nginx and Apache each needed a self-signed certificate on disk before they would serve the same site at all [23][2]. Where Caddy's certificate comes from at runtime is not covered in the comparison. Anyone planning a migration wants that written down rather than inferred from the adapted JSON already listening on `:443` [6].
Treat the line counts the way you would treat someone else's benchmark table. The nginx listing is cut off mid-directive in the published text, so there is no honest total to set against Caddy's nine [20]. No throughput figure appears anywhere; the stated scope is the configuration language and how much configuration has to be written at all [21][22]. For nine lines to transfer you need the example's shape: one site, one `/api/` prefix, one log file. At a dozen locations with regex fallbacks, what actually decides the migration is which resolution model your on-call can hold in their head, not the line count.
