3 ms·

I am by no means an expert in CPython/V8 internals, but arguably Python is way more dynamic (e.g., dunder methods), performs way more runtime checks (whereas JS

I am by no means an expert in CPython/V8 internals, but arguably Python is way more dynamic (e.g., dunder methods), performs way more runtime checks (whereas JS will happily keep on trucking if, say, you add a string to an integer), and its design makes it very hard to infer which value inhabits a variable at a given point in time (which you would need in order to apply optimizations to the bytecode). This kind of flexibility cannot come for free.

Qem 2y ago
Smalltalk and lisp are arguably even more dynamic and yet we have examples of faster runtimes for both.
- igouy 2y ago
  Except Python is as fast as C when it is C and Python text functions quickly become C functions. https://benchmarksgame-team.pages.debian.net/benchmarksgame/fastest/pharo-python.html https://benchmarksgame-team.pages.debian.net/benchmarksgame/...