threading support in python

[Paul Rubin]

skip at pobox.com writes:
> It was removed at one point in the dim, dark past (circa Python 1.4) on an
> experimental basis.  Aside from the huge amount of work, it resulted in
> significantly lower performance for single-threaded apps (that is, the
> common case).

That's probably because they had to put locking and unlocking around
every access to a reference count.  A real GC might have fixed that.