C API: Rework and enhance the PyUnicodeWriter implementation #158451

Activity

1. vstinner

   added

   topic-C-API

   on Sep 29, 2026
2. vstinner

   added 12 commits that reference this issue on Sep 30, 2026

   gh-158451: Add _PyUnicodeWriter_SetBuffer() helper function (#158452)

   ...

   00307b0

   pythongh-158451: Add _PyUnicodeWriter_WriteLatin1String() test

   ...

   33239e5

   pythongh-158451: Convert _PyUnicodeWriter_Prepare() to static inline …

   ...

   012ada4

   gh-158451: Add _PyUnicodeWriter_WriteLatin1String() test (#158464)

   ...

   26d3f5d

   gh-158451: Reuse PyUnicodeWriter_WriteStr() in PyUnicode_Format() (#1…

   ...

   82a89b3

   gh-158451: Convert _PyUnicodeWriter_Prepare() to static inline functi…

   ...

   70e6f3c

   pythongh-158451: Fix python-gdb.py for invalid Unicode strings

   ...

   2c9d197

   pythongh-158451: Fix python-gdb.py for invalid Unicode strings

   ...

   1fada1c

   pythongh-158451: Add _PyUnicodeWriter_FinishWithSize() test

   05e8924

   gh-158451: Add _PyUnicodeWriter_FinishWithSize() test (#158481)

   77c0675

   gh-158451: Fix python-gdb.py for invalid Unicode strings (#158475)

   ...

   7eada7c

   [3.14] gh-158451: Fix python-gdb.py for invalid Unicode strings (GH-1…

   ...

   13b1a4b
3. picnixz

   added

   interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

   type-refactorCode refactoring (with no changes in behavior)Code refactoring (with no changes in behavior)

   on Oct 1, 2026
4. vstinner

   changed the title [-]C API: Rework and enhance the PyUnicodeWriter implementation[/-] [+]C API: Rework and enhance the `PyUnicodeWriter` implementation[/+] on Oct 3, 2026
5. eendebakpt

   added 2 commits that reference this issue on Oct 8, 2026

   pythongh-158451: Speed up the pre-pass of str.join()

   ...

   df25f25

   pythongh-158451: Speed up the pre-pass of str.join()

   ...

   5c72cc0
6. vstinner

   added a commit that references this issue on Oct 9, 2026

   [3.15] gh-158451: Fix python-gdb.py for invalid Unicode strings (GH-1…

   ...

   bfc3ebe
7. vstinner commented on Oct 10, 2026

   

   vstinner

   on Oct 10, 2026

   Last edited by vstinner

   MemberAuthor

   More actions

   I wrote an article on this work (and PyBytesWriter work): https://vstinner.github.io/optimize-pybyteswriter-pyunicodewriter-implementation.html.
8. vstinner

   closed this as completedon Oct 10, 2026
9. vstinner

   added a commit that references this issue on Oct 10, 2026

   gh-158451: Remove _PyUnicodeWriter_WriteASCIIString() read-only optim (…

   ...

   8bf6305
10. orsenthil

    added a commit that references this issue on Oct 11, 2026

    pythongh-158451: Remove _PyUnicodeWriter_WriteASCIIString() read-only…

    ...

    022cb7e