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Elisp containers

From: Stefan Monnier
Subject: Elisp containers
Date: Fri, 07 Sep 2018 10:38:18 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux)

If someone feels like they have too much time on their hands, I think
a great feature to develop would be Elisp containers.

This would be like running Elisp in a separate process, except that it's
not a separate process, so communication between two containers can be
very efficient (e.g. you can send a buffer from one container to the
other as efficiently as you can send an integer).

Potential applications:
- true concurrency
- safely running arbitrary Elisp code (e.g. bug#32495)
- discover what a package defines without actually defining those things
  (i.e. load the package into a container, then look at what got
  defined and throw away the container).


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