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But the bar to parallelizing code gets much lower, in theory. Your serial code got 5% slower but has a direct path to being 50% faster.

And if there's a good free-threaded HTTP server implementation, the RPS of "Python code as a whole" could increase dramatically.

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You can do multiple processes with SO_REUSEPORT.

free-threaded makes sense if you need shared state.

Any webserver that wants to cache and reuse content cares about shared state, but usually has to outsource that to a shared in-memory database because the language can't support it.

And most web servers already need in memory databases for other things. And it’s a great design principle - use sharp focused tools.

Is there any news from FastAPI folks and/or Gunicorn on their support?

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