[throwaway894345]

The parent is talking about Python (specifically CPython, I assume), not Cython. Moreover, performance isn't a binary and there's lots of headroom for CPython to improve if they would be willing to drive the community through a breaking change (but the Python community generally assumes that any kind of breaking change necessarily has to look like the Python 2->3 transition and there's no political will for this). Note how many interpreted dynamic languages absolutely trounce CPython for anything that isn't a microbenchmark.