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I have a history question. I've seen this link a few times: https://www.gnu.org/prep/standards/html_node/Reading-Non_002...

Did this advice from GNU inspire you to optimise `yes`, did your optimised `yes` inspire GNU to write this, or is there no historical connection between your optimised `yes` and this advice?

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Trying to differentiate GNU implementations had nothing to do with it. This is never a consideration for me. It was worth the slight increase in complexity for the reasons stated in the commit message. Also an unmentioned point is that the coreutils code is very often referenced, so should be as robust and performant as possible, so those properties may percolate elsewhere.

Thanks, that makes a lot of sense.

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