The difference of latency between serving a file cached in user-space RAM (what nano-web is doing) and serving a file from the kernel buffer cache (also in RAM)

The difference of latency between serving a file cached in user-space RAM (what nano-web is doing) and serving a file from the kernel buffer cache (also in RAM) using sendfile should be totally negligible compared to the latency of your network, even if that network is "low latency". Latency Numbers Everyone Should Know: https://static.googleusercontent.com/media/sre.google/en//static/pdf/rule-of-thumb-latency-numbers-letter.pdf https://static.googleusercontent.com/media/sre.google/en//st... sendfile(2): https://man7.org/linux/man-pages/man2/sendfile.2.html https://man7.org/linux/man-pages/man2/sendfile.2.html