 tasks and the delay given is 1000
microseconds, upon 10000 unexecuted tasks accumulating a delay of 1000
microseconds will be applied to callers of event-post! which are not
in the event loop thread, at 20000 unexecuted tasks a delay of 8000
microseconds will be applied, and at 30000 unexecuted tasks a delay of
27000 microseconds will be applied, and so on.
</p>
<p>If throttle-threshold and throttle-delay arguments are not provided
(or #f is passed for them), then no throttling takes place.
</p></dd></dl>
