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bpo-42161: Micro-optimize _collections._count_elements() #23008

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Merged
merged 1 commit into from
Oct 27, 2020
Merged

bpo-42161: Micro-optimize _collections._count_elements() #23008

merged 1 commit into from
Oct 27, 2020

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@vstinner vstinner commented Oct 27, 2020

Move the _PyLong_GetOne() call outside the fast-path loop.

https://bugs.python.org/issue42161

Move the _PyLong_GetOne() call outside the fast-path loop.
@vstinner vstinner requested a review from rhettinger as a code owner October 27, 2020 20:31
@vstinner vstinner merged commit 35b95aa into python:master Oct 27, 2020
@vstinner vstinner deleted the count_one branch October 27, 2020 21:24
shihai1991 added a commit to shihai1991/cpython that referenced this pull request Oct 29, 2020
…lots1

* origin/master: (365 commits)
  bpo-42029: Remove IRIX code (pythonGH-23023)
  bpo-42143: Ensure PyFunction_NewWithQualName() can't fail after creating the func object (pythonGH-22953)
  bpo-34204: Use pickle.DEFAULT_PROTOCOL in shelve (pythonGH-19639)
  bpo-41805: Documentation for PEP 585 (pythonGH-22615)
  bpo-42161: Micro-optimize _collections._count_elements() (pythonGH-23008)
  bpo-42161: Remove private _PyLong_Zero and _PyLong_One (pythonGH-23003)
  bpo-42099: Fix reference to ob_type in unionobject.c and ceval (pythonGH-22829)
  bpo-41659: Disallow curly brace directly after primary (pythonGH-22996)
  bpo-6761: Enhance __call__ documentation (pythonGH-7987)
  bpo-42161: Modules/ uses _PyLong_GetZero() and _PyLong_GetOne() (pythonGH-22998)
  bpo-41474, Makefile: Add dependency on cpython/frameobject.h (pythonGH-22999)
  bpo-42157: Rename unicodedata.ucnhash_CAPI (pythonGH-22994)
  bpo-42161: Use _PyLong_GetZero() and _PyLong_GetOne() (pythonGH-22995)
  bpo-30681: Support invalid date format or value in email Date header (pythonGH-22090)
  bpo-42161: Add _PyLong_GetZero() and _PyLong_GetOne() (pythonGH-22993)
  bpo-42123: Run the parser two times and only enable invalid rules on the second run (pythonGH-22111)
  bpo-42157: Convert unicodedata.UCD to heap type (pythonGH-22991)
  bpo-42157: unicodedata avoids references to UCD_Type (pythonGH-22990)
  bpo-39101: Fixes BaseException hang in IsolatedAsyncioTestCase. (pythonGH-22654)
  bpo-1635741: _PyUnicode_Name_CAPI moves to internal C API (pythonGH-22713)
  ...
adorilson pushed a commit to adorilson/cpython that referenced this pull request Mar 13, 2021
)

Move the _PyLong_GetOne() call outside the fast-path loop.
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3 participants