How is GNU `yes` so fast?

Re:How is GNU `yes` so fast? by euske on Tuesday June 13, 2017 @10:02AM (#14544722)

I sometimes do

   yes "" | cat -n

to generate a sequence number.

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Re:How is GNU `yes` so fast? by cauterize on Tuesday June 13, 2017 @10:05AM (#14544752)

Try `seq 1 n`

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Re:How is GNU `yes` so fast? by JdeBP on Tuesday June 13, 2017 @02:00PM (#14547001)

euske may be using one of the operating systems (one such being mentioned on this very page) where there is no seq utility.

    JdeBP ~ $seq
    ksh: seq: not found
    JdeBP ~ $

Of course, on the one mentioned there is jot.

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Re:How is GNU `yes` so fast? by moyix on Tuesday June 13, 2017 @05:31PM (#14548833)

And on bash you can simply use {1..n}:

    $ echo {1..5}
    1 2 3 4 5

If you have Bash 4.0 or above, you can include a step size:

    $ echo {1..10..2}
    1 3 5 7 9

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