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Title: Add vectorcall (PEP 590) dispatch for function calls by youknowone · Pull Request #7329 · RustPython/RustPython · GitHub

Open Graph Title: Add vectorcall (PEP 590) dispatch for function calls by youknowone · Pull Request #7329 · RustPython/RustPython

X Title: Add vectorcall (PEP 590) dispatch for function calls by youknowone · Pull Request #7329 · RustPython/RustPython

Description: Add VectorCallFunc slot to PyTypeSlots and vectorcall dispatch path in the interpreter loop for Call and CallKw instructions. Implement vectorcall for PyFunction (with fast path for simple positional-only calls that fills fastlocals directly), PyBoundMethod (avoids prepend_arg O(n) shift), and PyNativeFunction. Add FuncArgs::from_vectorcall helper for fallback conversion. Vectorcall slot is inherited with call slot and cleared when call is overridden in Python subclasses. Summary by CodeRabbit Release Notes Refactor Implemented vectorcall (PEP 590) support throughout the VM for more efficient function call handling, reducing memory allocations and improving function call performance across builtin functions, regular functions, bound methods, and frame execution.

Open Graph Description: Add VectorCallFunc slot to PyTypeSlots and vectorcall dispatch path in the interpreter loop for Call and CallKw instructions. Implement vectorcall for PyFunction (with fast path for simple position...

X Description: Add VectorCallFunc slot to PyTypeSlots and vectorcall dispatch path in the interpreter loop for Call and CallKw instructions. Implement vectorcall for PyFunction (with fast path for simple position...

Opengraph URL: https://github.com/RustPython/RustPython/pull/7329

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8175bb7 Add vectorcall (PEP 590) dispatch for function calls youknowone Mar 3, 2026 https://github.com/RustPython/RustPython/pull/7329/commits/8175bb76cdce08374d9fa03a7c6eca631869aa5e
2226ae8 Optimize vectorcall: move args instead of clone, use vectorcall in sp… youknowone Mar 3, 2026 https://github.com/RustPython/RustPython/pull/7329/commits/2226ae80c0c828e956aa1d8c69b32e584cf19b55
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4d8cf97 Fix vectorcall_native_function kwarg slice out-of-bounds youknowone Mar 3, 2026 https://github.com/RustPython/RustPython/pull/7329/commits/4d8cf97452fd9f9dad64832a20d56a9d46fc4a10
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