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Re:Why you should use io_uring for network I/O by benlwalker on Wednesday April 12, 2023 @08:29PM (#35549167)
Without the submission batching you lose your system call reduction and that is far and away the biggest benefit.
Re:Why you should use io_uring for network I/O by dontlaugh on Thursday April 13, 2023 @04:59AM (#35552783)
The way I see it, a bigger benefit is avoiding readiness-triggered IO. That can add a variable number of syscalls, wakes up threads, etc.

Of course, batching is also great.