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Title: Refine specialization caches and extend binary-op coverage by youknowone · Pull Request #7386 · RustPython/RustPython · GitHub

Open Graph Title: Refine specialization caches and extend binary-op coverage by youknowone · Pull Request #7386 · RustPython/RustPython

X Title: Refine specialization caches and extend binary-op coverage by youknowone · Pull Request #7386 · RustPython/RustPython

Description: Summary Align BINARY_OP_EXTEND with descriptor-cache model: table-driven specialization for int|int bitwise, float|int and int|float mixed arithmetic Add _spec_cache (init/getitem) to HeapTypeExt with proper GC traverse/clear and lock-guarded version validation Tighten CALL_ALLOC_AND_ENTER_INIT stack-space and recursion guards Add latin-1 singleton string interning path for single-char subscript results Test plan cargo clippy clean extra_tests/snippets/vm_specialization.py passes CI: macOS, Ubuntu, Windows (existing flaky failures only) 🤖 Generated with Claude Code Summary by CodeRabbit Bug Fixes Clarified error message for invalid init return values. Chores Performance improvements for mixed-type arithmetic and binary operations via a new extended fast-path. Faster handling and caching for single-character strings. Centralized and more robust type-specialization caching; improved frame dispatch and init/cleanup handling. Vectorcall and exact-args call path tightened for safer fast-path use. Tighter tracing: trace callbacks now run only for actual trace events.

Open Graph Description: Summary Align BINARY_OP_EXTEND with descriptor-cache model: table-driven specialization for int|int bitwise, float|int and int|float mixed arithmetic Add _spec_cache (init/getitem) to HeapTypeExt ...

X Description: Summary Align BINARY_OP_EXTEND with descriptor-cache model: table-driven specialization for int|int bitwise, float|int and int|float mixed arithmetic Add _spec_cache (init/getitem) to HeapTypeExt ...

Opengraph URL: https://github.com/RustPython/RustPython/pull/7386

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5393e86 Align BINARY_OP_EXTEND with CPython descriptor cache model youknowone Mar 8, 2026 https://github.com/RustPython/RustPython/pull/7386/commits/5393e866dcc4589f2cc568d7cd3106cd7470274e
5bc6078 Align type _spec_cache and latin1 singleton string paths youknowone Mar 8, 2026 https://github.com/RustPython/RustPython/pull/7386/commits/5bc60780713299138f1ab6fd3483249ab5bdb773
cb156c1 Add specialization differential harness and align init error text youknowone Mar 8, 2026 https://github.com/RustPython/RustPython/pull/7386/commits/cb156c1db6b5221fe2e4048a823e5ca9e88b963b
fc4728b Tighten CALL_ALLOC_AND_ENTER_INIT stack-space guard youknowone Mar 8, 2026 https://github.com/RustPython/RustPython/pull/7386/commits/fc4728bbe16e9385521dd662244e06606d35a49f
c487b6d Align call-init frame flow and spec cache atomic ordering youknowone Mar 8, 2026 https://github.com/RustPython/RustPython/pull/7386/commits/c487b6d3e0d638ddafc06f57fbc5dfefe751bc50
2dd64b8 Refine call-init recursion guard and cache swap lifetime handling youknowone Mar 8, 2026 https://github.com/RustPython/RustPython/pull/7386/commits/2dd64b84174b4469dc94d329b487c8ea7abde8f2
a0c302c Align spec cache write locking with CPython contract youknowone Mar 8, 2026 https://github.com/RustPython/RustPython/pull/7386/commits/a0c302c459433bab6e8f59e7899bd77942986ffe
ceefe6e rename youknowone Mar 8, 2026 https://github.com/RustPython/RustPython/pull/7386/commits/ceefe6ebd135b202cf2f88ea22eee9ef021d30ba
2d7cb74 address review: invalidate init cache on type modification, add cspel… youknowone Mar 8, 2026 https://github.com/RustPython/RustPython/pull/7386/commits/2d7cb7449a8ef06a834a6328118239ab9b206d05
f7924dd Align load attr miss cooldown with CPython youknowone Mar 8, 2026 https://github.com/RustPython/RustPython/pull/7386/commits/f7924ddf38f487d093900b1b816c3e36adc48802
138d48e Align CALL descriptor and class-call specialization with CPython youknowone Mar 8, 2026 https://github.com/RustPython/RustPython/pull/7386/commits/138d48e4ca335e3c79f9be179aeeb9a49144834c
aa9f5a8 address review: check datastack space for extra_bytes, require CO_OPT… youknowone Mar 8, 2026 https://github.com/RustPython/RustPython/pull/7386/commits/aa9f5a8150c6e9590a73588268e24b7c0f10609c
a277b86 Extract datastack_frame_size_bytes_for_code, skip monitoring for init… youknowone Mar 9, 2026 https://github.com/RustPython/RustPython/pull/7386/commits/a277b86cfbe3952c515c5f05fca0be1a9c5f9fbb
dbd8b1a Fix Constants newtype usage in init_cleanup_code youknowone Mar 9, 2026 https://github.com/RustPython/RustPython/pull/7386/commits/dbd8b1a4660404df99dce73a35b3d182b2f59247
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