Saw this very old post comparing k-NN algorithm implemented in different languages, and for the love of my life I can't believe Rust runs the thing in over 1 minute.
So I took the code referred to in the post and ran it. Well it ran in over 40 seconds. I puzzled for an hour, even trying to implement the Go style code in Rust.
Then I realized I forgot the --release flag. I append it. It runs in not even a second.
How I got distracted by this when I was on that old blog for Hindley-Milner is another question.
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