Thanks for the info, guys.

I missed the major point that caused my confusion:

select() waits until I/O is available based on its timeout argument. I was
under the impression that it returned immediately and would constantly keep
the loop running at full speed if I/O is not available. Now it all makes
sense.

In addition, epoll() and kqueue() are better to use than select since
they're O(1) whereas select() is O(n).
--=20
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