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Title: Add method cache for MRO lookups by youknowone · Pull Request #7313 · RustPython/RustPython · GitHub

Open Graph Title: Add method cache for MRO lookups by youknowone · Pull Request #7313 · RustPython/RustPython

X Title: Add method cache for MRO lookups by youknowone · Pull Request #7313 · RustPython/RustPython

Description: 4096-entry direct-mapped cache keyed by (tp_version_tag, interned_name_ptr), mirroring CPython's type_cache in Objects/typeobject.c. find_name_in_mro() checks cache before MRO walk Auto-assigns version tags on cache miss (as in _PyType_Lookup) Negative caching for attribute-not-found results has_name_in_mro() avoids cloning on cache hit Invalidation via existing modified() mechanism (tp_version_tag=0) get_attr() and has_attr() now route through cached path Summary by CodeRabbit Performance Faster type attribute lookups via a new inline type-attribute cache. Cache is automatically cleared during garbage collection to avoid memory retention and improve cycle collection. New Features Added a public API to clear the type-attribute cache manually.

Open Graph Description: 4096-entry direct-mapped cache keyed by (tp_version_tag, interned_name_ptr), mirroring CPython's type_cache in Objects/typeobject.c. find_name_in_mro() checks cache before MRO walk Auto-assign...

X Description: 4096-entry direct-mapped cache keyed by (tp_version_tag, interned_name_ptr), mirroring CPython's type_cache in Objects/typeobject.c. find_name_in_mro() checks cache before MRO walk Auto-as...

Opengraph URL: https://github.com/RustPython/RustPython/pull/7313

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3a0ec60 Add method cache (MCACHE) for MRO lookups youknowone Mar 2, 2026 https://github.com/RustPython/RustPython/pull/7313/commits/3a0ec603a57da15a2203702e393ef3cb9a4670ec
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