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Title: bpo-31336: Speed up type creation, which is highly dominated by slow dict lookups. by scoder · Pull Request #3279 · python/cpython · GitHub

Open Graph Title: bpo-31336: Speed up type creation, which is highly dominated by slow dict lookups. by scoder · Pull Request #3279 · python/cpython

X Title: bpo-31336: Speed up type creation, which is highly dominated by slow dict lookups. by scoder · Pull Request #3279 · python/cpython

Description: This gives me around 20% better performance for class Test: pass. Admittedly, that's a micro-benchmark, but the change is obvious enough to not merit staying slow. https://bugs.python.org/issue31336

Open Graph Description: This gives me around 20% better performance for class Test: pass. Admittedly, that's a micro-benchmark, but the change is obvious enough to not merit staying slow. https://bugs.python.org/issu...

X Description: This gives me around 20% better performance for class Test: pass. Admittedly, that's a micro-benchmark, but the change is obvious enough to not merit staying slow. https://bugs.python.org/...

Opengraph URL: https://github.com/python/cpython/pull/3279

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bpo-31336: Speed up type creation, which is highly dominated by slow dict lookups. https://github.com/python/cpython/pull/3279/files#top
Show all changes 20 commits https://github.com/python/cpython/pull/3279/files
0a865c9 Speed up type creation, which is highly dominated by slow dict lookups. Sep 4, 2017 https://github.com/python/cpython/pull/3279/commits/0a865c9309c6548fe6380500f02240d1995d3b16
c4779e3 Update comment after changing the function call that it refers to. Sep 4, 2017 https://github.com/python/cpython/pull/3279/commits/c4779e3f7c06d1e53386f18e6bad3b045741369d
ff2ea63 Ignore any errors (however unlikely) that may happen during the mro c… Sep 4, 2017 https://github.com/python/cpython/pull/3279/commits/ff2ea631ebc3b64f8785cfdbaa922cd3546bd1b1
76b1986 Extract non-caching code from _PyType_Lookup() to use it directly fro… Sep 5, 2017 https://github.com/python/cpython/pull/3279/commits/76b1986e093e9b236106df3abb7dfcd6f60e43ad
6f98485 Avoid some useless overhead for the no-basetype case. If "object" eve… Sep 5, 2017 https://github.com/python/cpython/pull/3279/commits/6f9848520ca858ae72d14ee99d0d86796b664981
d9b726e Add comment. Sep 6, 2017 https://github.com/python/cpython/pull/3279/commits/d9b726e6ddaae31b01b41c33572e4f6f3fa1a63b
be15255 Avoid uselessly searching empty bases for a metaclass. This is quite … Sep 6, 2017 https://github.com/python/cpython/pull/3279/commits/be15255ff763ce1018a7318590dc37a4c1e04a00
0736226 Avoid unsafe handling of borrowed "mro" reference during hash() call. Sep 10, 2017 https://github.com/python/cpython/pull/3279/commits/0736226d67b43c70013a397be7157a7317b42057
8bc783f Clean up code and formatting a little. Sep 10, 2017 https://github.com/python/cpython/pull/3279/commits/8bc783f07e60c39afa464029b8d58443a0140137
66648dd Add braces for code style reasons. Sep 10, 2017 https://github.com/python/cpython/pull/3279/commits/66648dd568cfefdf1f003bce8fc2aced4ec6972b
85fb3ae Give internal helper function a local name that does not resemble (ex… Sep 10, 2017 https://github.com/python/cpython/pull/3279/commits/85fb3aedd4a878cbd18145c92b32a03c7fdcbfeb
09e716a Allow non-dict types for the class dict when looking up names and cal… Sep 11, 2017 https://github.com/python/cpython/pull/3279/commits/09e716a2e8eda777400da779c5a4f1b5e90375f6
1d52082 Lazily calculate name hash in find_name_in_mro() to avoid potential r… Sep 11, 2017 https://github.com/python/cpython/pull/3279/commits/1d52082bb544de02901f922242942253497cba58
f09bfd3 Revert "Lazily calculate name hash in find_name_in_mro() to avoid pot… Sep 11, 2017 https://github.com/python/cpython/pull/3279/commits/f09bfd3fe764ae5cfb18c2a8b334964c76566c91
824d7cb Revert "Allow non-dict types for the class dict when looking up names… Sep 11, 2017 https://github.com/python/cpython/pull/3279/commits/824d7cb25cd25368e9d04c5be5f75c8c790d8447
5184191 add news entry for faster class creation Sep 13, 2017 https://github.com/python/cpython/pull/3279/commits/51841915d6f5f87c7f3559c7c83d0b2ce8ffebff
4efde8e Change nice interface of "find_name_in_mro()" to evil interface eatin… Sep 13, 2017 https://github.com/python/cpython/pull/3279/commits/4efde8ea72195e987a7946985b22725b1d8f4e3a
f5bce2a Mention amount of speedup in News entry. Sep 13, 2017 https://github.com/python/cpython/pull/3279/commits/f5bce2a5494ee5856677d6345a55254e6cff2607
02bfef0 Revert "Change nice interface of "find_name_in_mro()" to evil interfa… Sep 14, 2017 https://github.com/python/cpython/pull/3279/commits/02bfef0f8dbe7b51e6f3c231c0d3d7a2554687ca
2497858 Guard against external live exceptions when calling find_name_in_mro(… Sep 14, 2017 https://github.com/python/cpython/pull/3279/commits/24978587ccaebb90ac858c6285b6d793a47ed969
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