Call Arity, oneShot, or both

[David Feuer]

Joachim Breitner כתב

That would be great! But do we have evidence of this user-written code
> that benefits? So far I have only seen relevant improvement due to
> list-fusion a left-foldish function.
>

I was under the impression that the transformation was much more general
than that, improving various recursive forms. Was I wrong? But aside from
that, I would be astonished if the library authors were the only ones
writing left-accumulating folds!

David
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