Pablo Galindo Salgado <pablog...@gmail.com> added the comment:
Bisecting points at:
commit ee48c7d54147ae906776b9f6f96e8920e097d0c4
Author: Dino Viehland <dinoviehl...@fb.com>
Date: Sat Mar 20 12:12:05 2021 -0700
bpo-43452: Micro-optimizations to PyType_Lookup (GH-24804)
The common case going through _PyType_Lookup is to have a cache hit. There
are some small tweaks that can make this a little cheaper:
* The name field identity is used for a cache hit and is kept alive by the
cache. So there's no need to read the hash code o the name - instead, the
address can be used as the hash.
* There's no need to check if the name is cachable on the lookup either,
it probably is, and if it is, it'll be in the cache.
* If we clear the version tag when invalidating a type then we don't
actually need to check for a valid version tag bit.
----------
nosy: +dino.viehland
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<https://bugs.python.org/issue43636>
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