On 4/20/2020 6:30 PM, Nathaniel Smith wrote:
We already have robust support for threads for low-isolation and subprocesses for high-isolation. Can you name some use cases where neither of these are appropriate and you instead want an in-between isolation – like subprocesses, but more fragile and with odd edge cases where state leaks between them? I don't know if this has been mentioned before or not, but I'll bring it up now: massively concurrent networking code on Windows. Socket connections could be passed off from the main interpreter to sub-interpreters for concurrent processing that simply isn't possible with the global GIL (provided the GIL actually becomes per-interpreter). On *nix you can fork, this would give CPython on Windows similar capabilities.