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Anyone that thought otherwise doesn't understand how complicated context switches are in CPUs

That’s not true. I understand how context switches work down to tss records, but can’t immediately see why nonblock should be less efficient. Is it due to for-rw vs for-poll-rw? Doesn’t kqueue/iocp ought to solve that?



kqueue, like all non-io_uring implementations on Linux, are synchronous under the hood.




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