[Python-Dev] RFC: PEP 509: Add a private version to dict (original) (raw)

Brett Cannon brett at python.org
Thu Apr 14 18:22:04 EDT 2016

On Thu, 14 Apr 2016 at 15:14 Victor Stinner <victor.stinner at gmail.com> wrote:

2016-04-14 23:29 GMT+02:00 Barry Warsaw <barry at python.org>: > I can see why you might want a global version number, but not doing so would > eliminate an implicit reliance on the GIL, or in a GIL-less implementation > a lock around incrementing the global version number.

It's not like the builtin dict type is going to become GIL-free... So I think that it's ok to use a global version. A very few know that, but the GIL has some advantages sometimes...

And even if it was GIL-free you do run the risk of two dicts ending up at the same version # by simply mutating the same number of times if the counters were per-dict instead of process-wide. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.python.org/pipermail/python-dev/attachments/20160414/7b9d9158/attachment.html>

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