squo;worker&rsquo; event loop, in
order to enable backpressure to be supplied if the &rsquo;worker&rsquo; event loop
becomes overloaded: see the documentation on the make-event-loop
procedure for further information about that.  (This procedure calls
event-post! in both the &rsquo;waiter&rsquo; and &rsquo;worker&rsquo; event loops by the
respective threads of the other, so either could be subject to
throttling.)
</p>
<p>Exceptions may propagate out of this procedure if they arise while
setting up, which sho