GH-113710: Fix updating of dict version tag and add watched dict stats #115221
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markshannon
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ericsnowcurrently and
gvanrossum
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Closed
mdboom
approved these changes
Feb 9, 2024
mdboom
reviewed
Feb 9, 2024
| @@ -133,6 +133,9 @@ typedef struct _rare_event_stats { | |||
| uint64_t builtin_dict; | |||
| /* Modifying a function, e.g. func.__defaults__ = ..., etc. */ | |||
| uint64_t func_modification; | |||
| /* Modifying a dict that is being watched */ | |||
| uint64_t watched_dict_modification; | |||
| uint64_t watched_globals_modification; | |||
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How do these new stats relate to the existing builtin_dict one?
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They only apply to any watched dict, and watched module globals respectively.
Whereas the builtin dict count tracks any modification to the builtins, which are always watched
In theory watched_globals_modification + builtin_dict == watched_dict_modification
Although, as soon as we start watching any other dicts that will no longer be true.
|
The stats look good ~800 dict watchers fired instead of 8 million. |
gvanrossum
approved these changes
Feb 10, 2024
It never was, it was (and still is) misnamed. |
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Fixes a regression introduced by #114592 where mutating a global variable would cause repeated de-optimizations.