But in this case are you really reaping any benefit of io_uring, if your existing code is still synchronous (except your io_uring layer)? It seems to me to see

But in this case are you really reaping any benefit of io_uring, if your existing code is still synchronous (except your io_uring layer)? It seems to me to see any substantial benefit, you'd have to propagate async throughout your codebase, which would require rewriting your existing code to use some async primitive. I guess something like Java Loom does help you mask this, however.