Nothing, except it's entirely unnecessary for this task. See "Useless use of cat... | Hacker News

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		shabble on March 11, 2012 \| parent \| context \| favorite \| on: Why is reading lines from stdin much slower in C++... Nothing, except it's entirely unnecessary for this task. See "Useless use of cat awards" from days of yore: http://partmaps.org/era/unix/award.html#uucaletter

truncate on March 11, 2012 [–]

I still prefer cat, as one simple mistake of < to > and the file is gone.

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