Thanks! This pattern occurs in a bunch of places outside of setobject.c. Can you fix those as well? I think it's worth fixing the entire pattern at once.

I think it's also probably worth refactoring the fast hash check into its own inline function (maybe in pycore_object.h or pycore_unicodeobject.h) that does the whole check the type, check the unicode hash, return it if it's not -1, otherwise delegate to PyObject_Hash().

Thanks! This pattern occurs in a bunch of places outside of setobject.c. Can you fix those as well? I think it's worth fixing the entire pattern at once.

I think it's also probably worth refactoring the fast hash check into its own inline function (maybe in pycore_object.h or pycore_unicodeobject.h) that does the whole check the type, check the unicode hash, return it if it's not -1, otherwise delegate to PyObject_Hash().

Thanks for the review! I think this new function is not related to unicode object only, so I added it in pycore_object.h, and named it _PyObject_HashFast().

Thanks @aisk for the PR, and @colesbury for merging it 🌮🎉.. I'm working now to backport this PR to: 3.13.
🐍🍒⛏🤖

GH-121240 is a backport of this pull request to the 3.13 branch.

Nice change, I like _PyObject_HashFast() which factorizes the code.

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 Debian root 3.13 has failed when building commit 06fd745.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/all/#builders/1441/builds/255) and take a look at the build logs.
4. Check if the failure is related to this commit (06fd745) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/all/#builders/1441/builds/255

Failed tests:

• test_repl

Failed subtests:

• test_asyncio_repl_is_ok - test.test_repl.TestInteractiveInterpreter.test_asyncio_repl_is_ok

Summary of the results of the build (if available):

==

Traceback (most recent call last):
  File "/root/buildarea/3.13.angelico-debian-amd64/build/Lib/asyncio/__main__.py", line 109, in run
    raise OSError(errno.ENOTTY, "tty required", "stdin")
xiting asyncio REPL...
Fatal Python error: _enter_buffered_busy: could not acquire lock for <_io.BufferedWriter name='<stderr>'> at interpreter shutdown, possibly due to daemon threads
Python runtime state: finalizing (tstate=0x0000557e5090ff50)


Traceback (most recent call last):
xiting asyncio REPL...
  File "/root/buildarea/3.13.angelico-debian-amd64/build/Lib/asyncio/__main__.py", line 109, in run
    raise OSError(errno.ENOTTY, "tty required", "stdin")
Fatal Python error: _enter_buffered_busy: could not acquire lock for <_io.BufferedWriter name='<stderr>'> at interpreter shutdown, possibly due to daemon threads
Python runtime state: finalizing (tstate=0x0000561498692f50)


Traceback (most recent call last):
  File "/root/buildarea/3.13.angelico-debian-amd64/build/Lib/test/test_repl.py", line 199, in test_asyncio_repl_is_ok
    assert_python_ok("-m", "asyncio")
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/root/buildarea/3.13.angelico-debian-amd64/build/Lib/test/support/script_helper.py", line 180, in assert_python_ok
    return _assert_python(True, *args, **env_vars)
  File "/root/buildarea/3.13.angelico-debian-amd64/build/Lib/test/support/script_helper.py", line 165, in _assert_python
    res.fail(cmd_line)
    ~~~~~~~~^^^^^^^^^^
  File "/root/buildarea/3.13.angelico-debian-amd64/build/Lib/test/support/script_helper.py", line 75, in fail
    raise AssertionError("Process return code is %d\n"
    ...<13 lines>...
                            err))
AssertionError: Process return code is -6
command line: ['/root/buildarea/3.13.angelico-debian-amd64/build/python', '-X', 'faulthandler', '-I', '-m', 'asyncio']

Buildbot failure is unrelated to this PR.

See #119909