> Python 3.11 is up to 10-60% faster than Python 3.10.

Nice!

> PEP 657 – Include Fine Grained Error Locations in Tracebacks

Hmm, what’s this?

    Traceback (most recent call last):
      File "test.py", line 2, in 
        x['a']['b']['c']['d'] = 1
        ~~~~~~~~~~~^^^^^
    TypeError: 'NoneType' object is not subscriptable

Yessss

I'm worried about the speedup

My understanding is that it's based on the most recent attempt to remove the GIL by Sam Gross

https://github.com/colesbury/nogil

In addition to some ways to try to not have nogil have as much overhead he added a lot of unrelated speed improvements so that python without the gil would still be faster not slower in single thread mode. They seem to have merged those performance patches first that means if they add his Gil removal patches in say python 3.12 it will still be substantially slower then 3.11 although faster then 3.10. I hope that doesn't stop them from removing the gil (at least by default)