Re: experimental jit support in python 3.13?

[Will McDonald]

I wouldn't personally depend on anything from ChatGPT exclusively. It's a
semi-useful tool but shouldn't be your only safeguard. Back it up with
further web search/reading documentation.

There's an alternative validation mechanism here:
https://drew.silcock.dev/blog/everything-you-need-to-know-about-python-3-13/...
contains

Which works for me on f41 with the bundled Python.

[wmcdonald@fedora ~ ]$ python --version
Python 3.13.1
[wmcdonald@fedora ~ ]$ python -c 'import sysconfig;print("JIT enabled 🚀"
if "-D_Py_JIT" in sysconfig.get_config_var("PY_CORE_CFLAGS") else "JIT
disabled 😒")'
JIT enabled 🚀
[wmcdonald@fedora ~ ]$

There's also a further example program calculating Fibonacci sequences
which works as you'd expect:

[wmcdonald@fedora ~ ]$ python jit.py
Doesn't look like the JIT is enabled 🥱
[wmcdonald@fedora ~ ]$ export PYTHON_JIT=1
[wmcdonald@fedora ~ ]$ python jit.py
JIT enabled 🚀

On Sat, 11 Jan 2025 at 12:04, Neal Becker  wrote:
> Thanks, but just to verify I asked chatgpt how to tell if it was enabled
> at compile time and it suggested:
>  import sysconfig
> print(sysconfig.get_config_var("WITH_EXPERIMENTAL_JIT"))
> which prints "None".
>
> On Fri, Jan 10, 2025 at 11:39 PM Todd Zullinger  wrote:
> > Neal Becker wrote:
> > > I believe experimental jit support in python 3.13 needs to
> > > be enabled both at compile time and at runtime.  Does
> > > Fedora's python3.13 have this enabled?
> >
> > Knowing nothing about this, I searched the fine web and
> > checked the Python 3.13 release notes which explain this and
> > how it is enabled and used:
> >
> > https://docs.python.org/3/whatsnew/3.13.html#an-experimental-just-in-time-ji...
> >
> > Then I looked at the source for the python3.13 package in
> > Fedora and can see that it is enabled at compile-time, but
> > disabled by default at runtime:
> >
> > https://src.fedoraproject.org/rpms/python3.13/blob/rawhide/f/python3.13.spec...
> >
> > You simply need to set PYTHON_JIT=1 to enable it.
> >
> > --
> > Todd
> > --
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