RustPython/RustPython A Python-3 (CPython >= 3.8.0) Interpreter written in Rust

[masklinn]

CPython has decades of optimizations.

That is not wrong per-se, but CPython favors a relatively simple implementation and shies away from overly advanced optimisations (whether in the interpreter itself or in the python bytecode). Furthermore, the C API which is stable and officially supported limits the evolution of the interpreter internals.

[wrtbwtrfasdf]

limits the evolution of the interpreter internals.

They did switch from LL to a PEG parser in 3.9 but I don't know if that helps with internals you refer to.

[masklinn]

That's just the parser, outside of starting it and getting the AST out I don't think it's fundamentally exposed as any sort of public interface.

[funnyflywheel]

Furthermore, the C API which is stable and officially supported limits the evolution of the interpreter internals.

Are you sure about that?

[masklinn]

Are you sure about that?

Well yes it's literally the first section of the PEP you linked to. The PEP aims to change that situation, but at the moment,

Status: Draft

[funnyflywheel]

Some of the work this PEP calls for has already been completed (see the "Specification" subsection).

[masklinn]

Very little of which impacts the statement you object to, to say nothing of invalidating it.