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For all I know, Python is extremely slow. If you think a 5x improvement is not possible then you may be underestimating how slow Python is.



Or aware how dynamic it is. The ability to run 'locals()' for example makes a lot of possible improvements quite tricky / more heavy than necessary.


pypy has been working on it, for 10 years though, and their average is 4x on their benchmarks. Sure, I think this means they do 10x or 20x performance on certain tasks, and that's impressive. But still, it's not easy to do 5x across the board.




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