Message9805

Oops, didn't include some details - ThreadStates can generally be recreated of course if there's no dynamic scope (so call_depth, etc) because that's just a function of being in the thread stack. The fact that weakKeys/weakValues can still work here is that even a generational GC is not reclaiming ThreadState objects as fast a tight performance loop as seen in pystone.

We still might want to expand on the caching behavior in some way in 2.7.1