That implementation doesn't short-circuit if the accumulator goes empty. It also relies on the optimizer to accumulate strictly.

On Mon, Dec 7, 2020, 3:44 AM Henning Thielemann <lemming@henning-thielemann.de> wrote:

On Sun, 6 Dec 2020, Reed Mullanix wrote:

> In a perfect world we would use something like Foldable1 from
> semigroupoids, but sadly that is not in base.

Is it necessary to have it in base for your use? For me, 'NonEmpty.foldl1
Set.intersection' is perfect.
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