Queue cleanup

[Gregory Ewing]

Paul Rubin wrote:

> These days I think the GC pause issue is overrated except for real-time
> control applications.

Also for games, which are a fairly common application
these days. Even a few milliseconds can be too long when
you're trying to achieve smooth animation.

I'd be disappointed if CPython ditched refcounting and
then became unsuitable for real-time games as a result.

-- 
Greg