[pull] main from python:main #733
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* Docs: module pages should not link to themselves * fix header punctuation
Add `_Py_type_getattro_stackref`, a variant of type attribute lookup that returns `_PyStackRef` instead of `PyObject*`. This allows returning deferred references in the free-threaded build, reducing reference count contention when accessing type attributes. This significantly improves scaling of namedtuple instantiation across multiple threads. * Add blurb * Rename PyObject_GetAttrStackRef to _PyObject_GetAttrStackRef * Apply suggestion from @vstinner Co-authored-by: Victor Stinner <vstinner@python.org> * Apply suggestion from @vstinner Co-authored-by: Victor Stinner <vstinner@python.org> * format * Update Include/internal/pycore_function.h Co-authored-by: Victor Stinner <vstinner@python.org> --------- Co-authored-by: Victor Stinner <vstinner@python.org>
Add Ascii85, Base85, and Z85 encoders and decoders to binascii, replacing the existing pure Python implementations in base64. This makes the codecs two orders of magnitude faster and consume two orders of magnitude less memory. Note that attempting to decode Ascii85 or Base85 data of length 1 mod 5 (after accounting for Ascii85 quirks) now produces an error, as no encoder would emit such data. This should be the only significant externally visible difference compared to the old implementation. Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Fix thread-safety issues when accessing frame attributes while another thread is executing the frame: - Add critical section to frame_repr() to prevent races when accessing the frame's code object and line number - Add _Py_NO_SANITIZE_THREAD to PyUnstable_InterpreterFrame_GetLasti() to allow intentional racy reads of instr_ptr. - Fix take_ownership() to not write to the original frame's f_executable
…4524) When the interpreter is in a stop-the-world pause, critical sections don't need to acquire locks since no other threads can be running. This avoids a potential deadlock where lock fairness hands off ownership to a thread that has already suspended for stop-the-world.
Add missing TEST_INTERNAL_C_API env var.
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📚 Documentation preview 📚: https://cpython-previews--733.org.readthedocs.build/