I guess, your ballpark estimate is too rough (and/or Python 3 has improved significantly since then). The sources / benchmarks that I used to back up my claims [1-3] imply use of pure Python, not "almost pure-C". That includes Web frameworks (FastAPI that I compared to Java / Go frameworks is pure Python, which, in turn, is based on Starlette, a pure-Python implementation of an ASGI framework).

[1] https://benchmarksgame-team.pages.debian.net/benchmarksgame/...

[2] https://github.com/frol/completely-unscientific-benchmarks

[3] https://www.techempower.com/benchmarks/#section=data-r19&hw=...