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0 pointsIshKebab2y ago0 comments

Because when people talk about Python performance they're talking about the performance of Python code itself, not C/Rust code that it's wrapping.

Pretty much any language can wrap C/Rust code.

Why does it matter?

1. Having to split your code across 2 languages via FFI is a huge pain.

2. You are still writing some Python. There's plenty of code that is pure Python. That code is slow.

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Of course in this case there's no FFI involved - the open function is built-in. It's as pure-Python as it can get.

Not sure I agree there, but anyway in this case the performance had nothing to do with Python being a slow or fast language.

How is it pure Python if it delegates all of the actual work to the Kernel?

All I/O delegates to the kernel, eventually.

It's pure Python in that there's no cffi, no ctypes, no Cython, no C extensions of any kind.

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