[1718627440]

> I guess Unix pipes are slow.

Or string concatenation, or pipeviewer.

[fukka42]

yes doesn't do string concatenation, at least not in the loop that matters. It just prepares a buffer of bytes once and writes it to stdout repeatedly.

https://github.com/coreutils/coreutils/blob/master/src/yes.c

[eru]

Compare https://codegolf.stackexchange.com/questions/199528/fastest-...