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Re: Any idea about what makes Emacs slow reading on pipes?
From: |
Andreas Schwab |
Subject: |
Re: Any idea about what makes Emacs slow reading on pipes? |
Date: |
Fri, 16 May 2003 23:00:51 +0200 |
User-agent: |
Gnus/5.1001 (Gnus v5.10.1) Emacs/21.3.50 (gnu/linux) |
address@hidden (David Kastrup) writes:
|> "Jan D." <address@hidden> writes:
|>
|> > >
|> > > The following exhibits abysmal speed within Emacs:
|> > >
|> > > (let (process-connection-type) (switch-to-buffer (generate-new-buffer
|> > > "*test*"))(erase-buffer)(start-process "test" (current-buffer) "sh"
|> > > "-c" "hexdump -v /dev/zero|dd bs=1 count=100k")(erase-buffer))
|> >
|> > ...
|> >
|> > > The system I see this in is
|> > > GNU Emacs 21.3.50.3 (i686-pc-linux-gnu)
|> > > a RedHat 9 system, but I have seen this in practically every Linux
|> > > system up to now. Is this a Linux-specific problem, or do others see
|> > > this as well?
|> >
|> > I could not reproduce this on a slackware (version unknown, but libc 6)
|> > or a Mandrake 9.0 system. Maybe running under strace can give some
|> > indication of the system call that takes time (if that is the issue)?
|>
|> Here is a more elaborate test file
Tried on ppc-suse-linux, I get constant throughput of 1024 characters at a
time. On MacOS X (through MOL) I get varying packet sizes between 97 and
1024.
Andreas.
--
Andreas Schwab, SuSE Labs, address@hidden
SuSE Linux AG, Deutschherrnstr. 15-19, D-90429 Nürnberg
Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
- Any idea about what makes Emacs slow reading on pipes?, David Kastrup, 2003/05/16
- Re: Any idea about what makes Emacs slow reading on pipes?, Jan D., 2003/05/16
- Re: Any idea about what makes Emacs slow reading on pipes?, David Kastrup, 2003/05/16
- Re: Any idea about what makes Emacs slow reading on pipes?, Jan D., 2003/05/16
- Re: Any idea about what makes Emacs slow reading on pipes?,
Andreas Schwab <=
- Re: Any idea about what makes Emacs slow reading on pipes?, Satyaki Das, 2003/05/16
- Re: Any idea about what makes Emacs slow reading on pipes?, Kim F. Storm, 2003/05/16
- Re: Any idea about what makes Emacs slow reading on pipes?, David Kastrup, 2003/05/16
- Re: Any idea about what makes Emacs slow reading on pipes?, Kim F. Storm, 2003/05/17
- Re: Any idea about what makes Emacs slow reading on pipes?, Stefan Monnier, 2003/05/17
- Re: Any idea about what makes Emacs slow reading on pipes?, David Kastrup, 2003/05/17
- Re: Any idea about what makes Emacs slow reading on pipes?, Stefan Monnier, 2003/05/17
- Re: Any idea about what makes Emacs slow reading on pipes?, Kai Großjohann, 2003/05/18
- Re: Any idea about what makes Emacs slow reading on pipes?, David Kastrup, 2003/05/18
- Re: Any idea about what makes Emacs slow reading on pipes?, Richard Stallman, 2003/05/18