From: Richard Stallman <rms@gnu.org>
Cc: gnu-emacs-bug@moderators.isc.org
Subject: Re: M-x compile output sometimes delayed
Date: Fri, 5 Apr 2002 12:05:47 -0700 (MST) [thread overview]
Message-ID: <200204051905.g35J5lR18956@aztec.santafe.edu> (raw)
In-Reply-To: <m23cyb6tta.fsf@jidanni.org> (message from Dan Jacobson on 05 Apr 2002 05:24:33 +0800)
I do M-x compile. I see the output in fits and starts, not every 4
seconds.
That certainly should not happen. It does not fail for me, though.
Can anyone reproduce this and debug it?
Eli wrote:
I think you forget about I/O buffering. Emacs runs subordinate processes
via a pipe, and pipes are buffered by the system.
Sure, but unless Emacs is busy, that should only result in a very
short delay before Emacs wakes up, reads the data, puts it in the
buffer, and displays it. If Emacs fails to do this promptly,
that is indeed a bug in Emacs.
In addition, Emacs only checks whether there was input from a subprocess
when it's not busy doing other things, so that could account for additional
delays.
That is true, but I get the impression that Emacs was not doing any
other computation in that test case. He said the processor was 99%
idle, which it would not have been if Emacs had been running the whole
time.
next prev parent reply other threads:[~2002-04-05 19:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-04 21:24 M-x compile output sometimes delayed Dan Jacobson
2002-04-05 5:36 ` Eli Zaretskii
2002-04-05 19:05 ` Richard Stallman [this message]
2002-04-10 6:03 ` Dan Jacobson
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