[issue40255] Fixing Copy on Writes from reference counting

[Steve Dower]

Steve Dower <steve.dower at python.org> added the comment:

> There is a trend right now to try to remove immortal objects (started by Victor and others) like static types and transforming them to heap types.

This isn't actually about removing immortal objects, but removing *mutable* objects that would be shared between subinterpreters. Making some objects immortal, such as interned strings or stateless singletons, would actually benefit this work, as they could then be safely shared between subinterpreters.

But as you say, the added complexity here is starting to seem like it'll cost more than it's worth...

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<https://bugs.python.org/issue40255>
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