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Date: Mon, 19 Feb 2007 10:20:14 -0800
From: Christopher Layne <clayne AT anodized DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: xargs problem
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On Mon, Feb 19, 2007 at 05:34:31PM +0100, Corinna Vinschen wrote:
> > If you want a command run once for each item in a list of
> > things, use a for loop:
> 
> ...or `xargs -n 1'
> 
> 
> Corinna

Yeah, unfortunately don't try to do too much with that or you'll be
waiting for a while.

$ uname -a; uptime; time echo 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 | xargs -n1 >/dev/null
CYGWIN_NT-5.2 opteron 1.7.0s(0.165/4/2) 20070215 07:41:32 i686 Cygwin
 10:05:57 up 1 day, 11:10,  0 users,  load average: 0.00, 0.00, 0.00

real    0m5.185s
user    0m0.150s
sys     0m0.573s

$ uname -a; uptime; time echo 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 | xargs -n1 >/dev/null
Linux ns1 2.6.20 #8 Mon Feb 19 08:03:12 PST 2007 i686 GNU/Linux
 10:06am  up   1:50,  7 users,  load average: 3.08, 4.67, 5.53

real    0m0.366s
user    0m0.012s
sys     0m0.080s

Gotta love it when a Linux box with *literally* 1/10th the cpu power
(Celeron-D 2ghz Prescott core) is compiling KDE, and still knocking off
numbers 15x times as fast as my hulked out dual-core Opteron 180. What
is that, a ratio of about 150x times slower due to the blazing fork()
we have now?

-cl

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