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Groups > comp.os.linux.misc > #16985
| From | Robert Riches <spamtrap42@jacob21819.net> |
|---|---|
| Newsgroups | comp.os.linux.misc |
| Subject | Re: seq command terribly slow |
| Date | 2016-03-15 02:44 +0000 |
| Organization | none-at-all |
| Message-ID | <slrnneeton.otf.spamtrap42@one.localnet> (permalink) |
| References | <slrnne9qgo.5pk.spamtrap42@one.localnet> <eli$1603141758@qz.little-neck.ny.us> |
On 2016-03-14, Eli the Bearded <*@eli.users.panix.com> wrote: > In comp.os.linux.misc, Robert Riches <spamtrap42@jacob21819.net> wrote: >> This command shows about 15MB/s: >> >> seq 1e12 | pv > /dev/null > > Does it store 1e12 as a floating point number and make conversion to int > for comparision every time through the loop? printf() format all output? > > What do you get if you enable chargen in your inetd provider and then > "telnet localhost chargen"? > > Elijah > ------ > cause that's the character generator an old-timer like me would use The man page does seem to imply that seq uses floating point math internally. However, with a reasonably modern CPU, I would expect it should do be able to do better than 15MB/s, even doing double precision floating point math. Another poster said a more modern seq version is faster than the pipeline in his tests. "whatis chargen" yields "chargen: nothing appropriate." "locate chargen" yields nothing. -- Robert Riches spamtrap42@jacob21819.net (Yes, that is one of my email addresses.)
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seq command terribly slow Robert Riches <spamtrap42@jacob21819.net> - 2016-03-13 04:18 +0000
Re: seq command terribly slow Richard Kettlewell <rjk@greenend.org.uk> - 2016-03-13 12:24 +0000
Re: seq command terribly slow Robert Riches <spamtrap42@jacob21819.net> - 2016-03-13 16:42 +0000
Re: seq command terribly slow "Anonymous Remailer (austria)" <mixmaster@remailer.privacy.at> - 2016-03-14 14:22 +0100
Re: seq command terribly slow Robert Riches <spamtrap42@jacob21819.net> - 2016-03-15 02:38 +0000
Re: seq command terribly slow Gernot Fink <g.fink@gmx.net> - 2016-03-13 18:21 +0100
Re: seq command terribly slow Richard Kettlewell <rjk@greenend.org.uk> - 2016-03-13 17:45 +0000
Re: seq command terribly slow Eli the Bearded <*@eli.users.panix.com> - 2016-03-14 21:58 +0000
Re: seq command terribly slow Robert Riches <spamtrap42@jacob21819.net> - 2016-03-15 02:44 +0000
Re: seq command terribly slow Eli the Bearded <*@eli.users.panix.com> - 2016-03-16 00:41 +0000
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