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1. Commits on May 24, 2026

   • gh-148444: Use "zero of any numeric type" instead of "numeric zero of all types" (#148455)

     siliconforks

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   • gh-150244: Fix `test_create_subprocess_env_shell` to handle PATH with spaces (#150281)

     edvilme

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2. Commits on May 23, 2026

   • gh-150258: Show relative percentage on Tachyon flamegraph (#150266)

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     edvilme

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   • gh-149800: Split perf trampoline assembly into per-architecture files (#149894)

     stratakis

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   • gh-145192: improve performance of `PySequence_GetSlice` (#145193)

     eendebakpt

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   • gh-149816: add missing critical section on self in buffered_iternext (#150295)

     kumaraditya303

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   • gh-150116 Remove dead try/except in `asyncio.Lock._wake_up_first` (#150117)

     

     deadlovelll

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   • gh-150178: Fix refcount leaks in hamt allocation failure paths (#150179)

     lpyu001

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   • gh-148450: `abc.register` needs to update `type_version` when `tp_flags` is changed (#148623)

     cocolato

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   • gh-150232: update Thread group parameter doc (#150283)

     

     My-ABC

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3. Commits on May 22, 2026

   • gh-150114: Log the memory usage in regrtest on Windows (#150267)

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     vstinner

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     cmaloney

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   • gh-82907: Document mtime=0 for reproducible tarfile gzip output (GH-150269)

     omkar-334

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   • gh-150114: Log the memory usage in regrtest in sequential mode (#150264)

     vstinner

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   • Revert "gh-146452: Improve locking granularity in pickle's batch_dict_exact and fix race condition (#150025)" (#150261)

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     vstinner

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   • gh-149189: Revert "Modern defaults for `pprint` (#149190)" (#150249)

     hugovk

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   • gh-149879: Fix test_capi on Cygwin (#150252)

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     vstinner

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   • gh-149879: Fix test_c_stack_unwind on Cygwin (#150084)

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     vstinner

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   • gh-149879: Fix test__locale on Cygwin (#150248)

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     vstinner

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   • gh-150114: Log the memory usage in regrtest (#150255)

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     vstinner

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   • Remove 'expat' dependency for Linux in `Misc/Brewfile` (#150118)

     brettcannon

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   • gh-149879: Fix test_c_locale_coercion on Cygwin (#150250)

     vstinner

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   • gh-91372: Add mtime to gzip.open() (GH-32310)

     ellaellela

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   • gh-149902: Remove dead packaging docs link and add a new section for external resources (#150030)

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   • gh-137571: Protect against possible UnboundLocalError in gzip._GzipReader.read() (GH-150222)

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     serhiy-storchaka

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   • gh-133998: Fix gzip file creation when time is out of range (GH-134278)

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     adang1345

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     serhiy-storchaka

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   • gh-149995: Update typing.py docstrings and documentation (#149996)

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     JelleZijlstra

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   • gh-148294: Make configure find g++ correctly (GH-148298)

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     sendaoYan

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4. Commits on May 21, 2026

   • gh-149819: fix .pth and .start file processing in subprocess when inheriting PYTHONPATH (#150177)

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     3 peopleauthored
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   • gh-107398: Fix tarfile stream mode exception when process the file with the gzip extra field (GH-126304)

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     Zheaoli

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     serhiy-storchaka

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   • Remove accidentally added `Python/deepfreeze/deepfreeze.c` (gh-150192)

     StanFromIreland

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   • gh-149358: Generating JIT recorder transformers and stabilizing family layouts (GH-149359)

     cocolato

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   • gh-149335: Avoid JIT trace buffer asserts with overhead above `FITNESS_INITIAL` (GH-149633)

     cocolato

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   • gh-148871: Add CONSTANT_EMPTY_TUPLE to LOAD_COMMON_CONSTANT (GH-149688)

     eendebakpt

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   • gh-149219: Test `frozendict` in `Lib/test/test_crossinterp.py` (#149220)

     sobolevn

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   • gh-149981: Test lazy import corner cases with module-level `__getattr__` (#149982)

     sobolevn

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