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Re: Any idea about what makes Emacs slow reading on pipes?
From: |
Kai Großjohann |
Subject: |
Re: Any idea about what makes Emacs slow reading on pipes? |
Date: |
Sun, 18 May 2003 17:50:51 +0200 |
User-agent: |
Gnus/5.1003 (Gnus v5.10.3) Emacs/21.3.50 (gnu/linux) |
address@hidden (David Kastrup) writes:
> Interestingly enough, I can't reliably reproduce this effect either.
> Hilarious. Maybe it has something to do with what xterms I started as
> background processes (different nicety?). Oh, if I have a block
> cursor blinking in yet another window, this seems to help. Crazy.
I tried "emacs -q -no-site-file" for the blinking cursor. No dice.
Here's what I did:
I start the dd thing, then click on the Emacs to give it focus. The
output from dd shortly (for a second or so) slows down, then resumes
again at the previous speed (before Emacs was started). I then start
the while look which doesn't change the speed, either. I again click
on the Emacs window to resume the blinking cursor, which causes a
short pause in the dd output, as before.
>> I'm running Linux 2.4.20 on a 2GHz Celeron. I think that means I
>> don't have Hyperthreading and therefore just one CPU.
>
> Perhaps your CPU is to fast.
Could be.
>> I've now looked again on another machine (2GHz Mobile Pentium 4, same
>> kernel), and I can see the leading digits couting, and they count at
>> the same speed regardless of the while loop.
>
> Well, having just half the computing power available at least should
> not leave you with the same speed, should it?
So maybe neither the dd nor the infloop require 100% CPU. Maybe the
terminal (KDE program "konsole") is too slow in printing all this
stuff?
--
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- Re: Any idea about what makes Emacs slow reading on pipes?, (continued)
- 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
- 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?, Kai Großjohann, 2003/05/19
- Re: Any idea about what makes Emacs slow reading on pipes?, David Kastrup, 2003/05/19
- 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?, 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?,
Kai Großjohann <=
- 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?, Kai Großjohann, 2003/05/19
- Re: Any idea about what makes Emacs slow reading on pipes?, David Kastrup, 2003/05/19
- Re: Any idea about what makes Emacs slow reading on pipes?, Richard Stallman, 2003/05/18