[kmod]

This is a common view but I've never heard it from someone who has tried to optimize Python. Personally I think that Python is as much more dynamic than JavaScript as JavaScript is than C. (I can't talk for the other languages.)

Just look at the small example in this post: - converting things to strings invokes several layers of dynamic dispatches - Python has an extremely expressive calling convention that can cause a lot of overhead

Another example that I like to give is that in Python you can inspect the stack variables of exited frames! The Python-on-mature-VM projects have also not resulted in great performance.

I hear your argument a lot, and I disagree and I also believe it misguides optimization efforts ("let's just apply JS techniques to Python") including our early ones with Pyston. It's part of what I'm trying to get at with this blog post, but maybe I'll write another one specifically about Python vs other languages.

[pjmlp]

Smalltalk can do all of that and Python doesn't even have something like become:.