I’m afraid I don’t know the details. However, this post seems relevant - someone who worked on the JIT at Dropbox describes how expensive function calls in CPyt

I’m afraid I don’t know the details. However, this post seems relevant - someone who worked on the JIT at Dropbox describes how expensive function calls in CPython can be: https://blog.kevmod.com/2020/05/python-performance-its-not-just-the-interpreter/ https://blog.kevmod.com/2020/05/python-performance-its-not-j...