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Move stats for the method cache into thePy_STAT machinery#100255

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Merged
markshannon merged 4 commits intopython:mainfromfaster-cpython:type-cache-stats
Dec 15, 2022

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markshannon
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Resulting table looks like this:

Object stats

CountRatio
Allocations from freelist4,589,260,80846.0%
...
Method cache hits1,525,324,505
Method cache misses69,170,546
Method cache collisions73,503,400
Method cache dunder hits2,066,830,615
Method cache dunder misses4,345,814

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netlifybot commentedDec 14, 2022
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LGTM

Comment on lines +4174 to +4175
OBJECT_STAT_INC_COND(type_cache_misses, !is_dunder_name(name));
OBJECT_STAT_INC_COND(type_cache_dunder_misses, is_dunder_name(name));
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I assume there's no user of these stats who will care that the definition of a "miss" now includes collisions whereas before it excluded collisions? Obviously the same information is derivable either way.

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The old stats were only available ifMCACHE_STATS was defined, which could only be done by editing the source or build. There is no configure option. So, I don't see how there can be a user.

@markshannonmarkshannon merged commit48e352a intopython:mainDec 15, 2022
carljm added a commit to carljm/cpython that referenced this pull requestDec 16, 2022
* main:  Improve stats presentation for calls. (pythonGH-100274)  Better stats for `LOAD_ATTR` and `STORE_ATTR` (pythonGH-100295)pythongh-81057: Move the Cached Parser Dummy Name to _PyRuntimeState (python#100277)  Document that zipfile's pwd parameter is a `bytes` object (python#100209)pythongh-99767: mark `PyTypeObject.tp_watched` as internal use only in table (python#100271)  Fix typo in introduction.rst (python#100266)pythongh-78997: AttributeError if loading fails in LibraryLoader.__getattr__pythonGH-100234: Set a default value for random.expovariate() (pythonGH-100235)  Remove uninformative itertools recipe (pythonGH-100253)pythonGH-99767: update PyTypeObject docs for type watchers (pythonGH-99928)  Move stats for the method cache into the `Py_STAT` machinery (pythonGH-100255)pythonGH-100222: fix typo _py_set_opocde -> _py_set_opcode (pythonGH-100259)pythonGH-100000: Cleanup and polish various watchers code (pythonGH-99998)pythongh-90111: Minor Cleanup for Runtime-Global Objects (pythongh-100254)
@markshannonmarkshannon deleted the type-cache-stats branchSeptember 26, 2023 12:53
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@carljmcarljmcarljm approved these changes

@mdboommdboomAwaiting requested review from mdboom

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