I still have to disagree, it's not because both slow and fast JS engines exist (recent ones vs those from before around 2008), or both slow and fast python engi

I still have to disagree, it's not because both slow and fast JS engines exist (recent ones vs those from before around 2008), or both slow and fast python engines exist (CPython vs PyPy), that it's not ok to point out that the vanilla official python interpreter is much slower than possible. Why does one have to be ok with a totally expected speed difference? This is the official interpreter of a language, they give a slow tool by default, the official tool deserves scrutiny.