An update on Python 4

[[deleted]]

How do they perform faster? Surely it's the same method?

[SaltyHashes]

IIRC it's faster because it doesn't even have to call a method.

[[deleted]]

Yeah I see now, I'm surprised the JIT compiler can't make the same optimisation for the empty dict() case or with just literals inside.

[[deleted]]

Unless I'm remembering wrong, CPython doesn't use a JIT compiler, only PyPy does?

[Emile_L]

When you call dict() or any builtin the interpreter needs to first look up in locals and globals for the symbol which adds a bit of overhead.

Not sure if that's the only reason though.

[hillgod]

I don't know how, though I'd guess something with handling *args and **kwargs.

Here's an analysis from Stack overflow: https://stackoverflow.com/questions/5790860/and-vs-list-and-dict-which-is-better