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I recently made some benchmarking from python 3.9 to 3.13 And up to 3.11 it only got better. Python 3.12 and 3.13 were about 10% slower than 3.11. I thought my

I recently made some benchmarking from python 3.9 to 3.13 And up to 3.11 it only got better. Python 3.12 and 3.13 were about 10% slower than 3.11. I thought my homemade benchmark wasn't great enough so I deployed it to a core service anyway and I saw same changes in our collected metrics. Does anyone else have the same problem?

sgarland 2y ago
Yes, I found a loop performance regression [0] in 3.12 and 3.13. [0]: https://github.com/python/cpython/issues/123540 https://github.com/python/cpython/issues/123540
lazka 2y ago
I'm also still using 3.11 for a FastAPI app since 3.12 and 3.13 are quite a bit slower.