Services like Lambda are basically single process per request. They just pre-fork instances under load, similar to Apache. Because of the not insignificant inst

Services like Lambda are basically single process per request. They just pre-fork instances under load, similar to Apache. Because of the not insignificant instrumentation and other overhead in cloud architectures (e.g. Lambda uses VMs for isolation, Cloudflare uses WASM), a small, natively compiled CGI app probably uses less CPU and I/O than these modern solutions as starting a new process in Linux from an already cached copy of the executable doesn't really have much overhead in comparison to the layers of software involved in some of the aforementioned options, despite their other optimizations.