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> It doesn't practically matter how efficient the X server is when
> you aren't busy, after all.

A simple polling scheme (i.e. not using poll() or select(), just looping
through all fd's trying nonblocking reads) is perfectly efficient when the
server is 100% busy, and perfectly inefficient when there is nothing to do.
I'm not saying that your statements are wrong--in your example, X is calling
select() which is not wasting as much time as a hard-polling loop--but it's
wrong to say that high-load efficiency is the primary concern. I would be
horrified if X took a signifigant portion of the CPU time when many clients
were connected, but none were actually doing anything.


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