[whatwg] Workers and queue of events

[Dmitry Titov]

Pages communicate with their workers (dedicated) via queue of
events<http://www.whatwg.org/specs/web-workers/current-work/#the-queue>
.
What happens if the queue gets more and more events queued (as a result of
postMessage or timer callbacks) and the worker thread does not consume them
fast enough?

   - setInterval can skip posting a callback if the previously posted one
   was not yet consumed.
   - setTimeout is probably ok as it is but if the worker script adds them
   in a loop it can be a problem.
   - postMessage could somehow indicate a queue overflow and ignore the
   attempt to post a message if the queue length exceeds some specific
   threshold.


Basically, the queue probably should have a limit on it and once the limit
is reached, the queue-based operations should start to fail, optionally with
some indication.

Dmitry
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