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Title: gh-142889: Restructure PyDictKeysObject memory layout for simpler access by clintonsteiner · Pull Request #145097 · python/cpython · GitHub

Open Graph Title: gh-142889: Restructure PyDictKeysObject memory layout for simpler access by clintonsteiner · Pull Request #145097 · python/cpython

X Title: gh-142889: Restructure PyDictKeysObject memory layout for simpler access by clintonsteiner · Pull Request #145097 · python/cpython

Description: Restructure dict keys allocation to store dk_indices before the PyDictKeysObject header and keep dk_entries after the header. Update dict index access and related allocation/free/clone paths, adjust gdb dict entry location logic, and add layout coverage tests. Local dict microbenchmarks showed about a 1.4% overall improvement, with most operations around 1-2% faster. Issue: gh-142889

Open Graph Description: Restructure dict keys allocation to store dk_indices before the PyDictKeysObject header and keep dk_entries after the header. Update dict index access and related allocation/free/clone paths, adjus...

X Description: Restructure dict keys allocation to store dk_indices before the PyDictKeysObject header and keep dk_entries after the header. Update dict index access and related allocation/free/clone paths, adjus...

Opengraph URL: https://github.com/python/cpython/pull/145097

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9eec989 gh-142889: Restructure PyDictKeysObject memory layout for simpler ent… clintonsteiner Feb 22, 2026 https://github.com/python/cpython/pull/145097/commits/9eec9899ff4d58f139857b8ee108f8f4d7d7e65f
4602616 ci fixes for wasl and c-global checker clintonsteiner Feb 22, 2026 https://github.com/python/cpython/pull/145097/commits/46026168a48433d16d2b3b5600e16d5d2fc0ff9c
270837b ci fixes for wasl and c-global checker clintonsteiner Feb 22, 2026 https://github.com/python/cpython/pull/145097/commits/270837b2a4ae56540b54d2f0dc70444832fc96b4
cc0a356 address pr comments clintonsteiner Feb 22, 2026 https://github.com/python/cpython/pull/145097/commits/cc0a3561165b4692877d13ba47e80767ccfd86df
e6754e9 gh-142889: Address PR review comments on PyDictKeysObject restructure clintonsteiner Mar 11, 2026 https://github.com/python/cpython/pull/145097/commits/e6754e95a831f96f2d521a84b99fd35f68125f67
e9d9ec5 correct gbd test usage to use dk_entries instead of dk_indices clintonsteiner Mar 11, 2026 https://github.com/python/cpython/pull/145097/commits/e9d9ec5265b92d8a922e5ad86c7301dc60492d86
4c889e8 fix LOAD_INDEX/STORE_INDEX to use _DK_INDICES_BASE for well-defined p… clintonsteiner Mar 11, 2026 https://github.com/python/cpython/pull/145097/commits/4c889e8b75c1bc442e940853f7c852a4532aff5f
aad4907 fix windows 32 bit: use clang -target i686-pc-windows-msvc clintonsteiner Mar 25, 2026 https://github.com/python/cpython/pull/145097/commits/aad4907d0381abc4a4b7d1acbd19454fb40fa426
8e74bdc Fix gcc warning for empty dict keys initializer clintonsteiner Mar 25, 2026 https://github.com/python/cpython/pull/145097/commits/8e74bdcd47a10216f8fdbb56345faf8c198533e8
b82ae49 gh-0: Fix dict empty keys initializer braces clintonsteiner Mar 25, 2026 https://github.com/python/cpython/pull/145097/commits/b82ae49a3ccf93dc4b390aeb53f4875e659b2f7c
4210757 Merge branch 'main' into gh-142889 clintonsteiner Mar 25, 2026 https://github.com/python/cpython/pull/145097/commits/4210757ef294d8a77fce6bda92f8d10e53783fbe
750c33b Merge branch 'main' into gh-142889 clintonsteiner Mar 27, 2026 https://github.com/python/cpython/pull/145097/commits/750c33b2692f9358cda08f4142b02d694984cd8c
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