Does a low-traffic Crystal HTTP::Server app need preview_mt, or is the default fiber scheduler enough?
I'm planning a small Crystal service built on the standard library's HTTP::Server. Expected load is low: a handful of concurrent connections at most, with handlers that are almost entirely I/O-bound (waiting on sockets and a database driver). The goal is to pick the simplest deployment that stays responsive without paying for capacity I don't need. My unders