Just to be a bit pedantic, what you really want is several concurrent IOs, doesn’t have to be multithreaded. For example, io_uring can kick off many concurrent

Just to be a bit pedantic, what you really want is several concurrent IOs, doesn’t have to be multithreaded. For example, io_uring can kick off many concurrent IOs off a single (userspace) thread. But yes, if you don’t have io_uring you need to use threads, and if you use a lot of them context switches can have a nontrivial overhead from my experience.