On Feb 7, 3:47 pm, Andy Fingerhut <andy.finger...@gmail.com> wrote:

> (defn find-index [f coll]
>    (loop [i (int 0)
>           s (seq coll)]
>      (if (f (first s))
>        i
>        (recur (unchecked-inc i) (rest s)))))
>


I didn't realize how slow my version of this was.
This change alone shaves off about half a second
on my computer.

This function needs to be built into the language.

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