Why GIL? (was Re: what's the point of rpython?)

[Paul Rubin]

Bryan Olson <fakeaddress at nowhere.org> writes:
> > BTW, class instances are usually immutable and thus don't require a
> > mutex in the system I described.
> Then you are describing a language radically different from Python.

That one threw me for a minute too, but I think the idea is that the
class instance itself is immutable, while its slots (specifically the
attribute dictionary) point to mutable objects.