File caching and serving #3
Description
We can implement sendfile via io_uring and splice: https://github.com/axboe/liburing/blob/cce606671f5b51ab460f8f21f9cd2c43a1104c4a/src/include/liburing.h#L249
We should benchmark that against a regular, blocking sendfile
An intermediate, in-memory pipe can be created via the pipe syscall https://man7.org/linux/man-pages/man2/pipe.2.html