GNU bug report logs - #895
slow processing of process output

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#895: closed (slow processing of process output)
Date: Thu, 30 Jun 2011 01:11:01 +0000

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Your message dated Thu, 30 Jun 2011 03:10:06 +0200
with message-id <m3liwk86q9.fsf <at> quimbies.gnus.org>
and subject line Re: bug#895: slow processing of process output
has caused the GNU bug report #895,
regarding slow processing of process output
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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From: Dan Nicolaescu <dann <at> ics.uci.edu>
To: bug-gnu-emacs <bug-gnu-emacs <at> gnu.org>
Subject: slow processing of process output
Date: Fri, 05 Sep 2008 08:43:32 -0700

emacs -Q -nw
M-x rgrep RET emacs RET *.el RET PATH_TO_EMACS_SOURCE_TREE/lisp RET

takes a few minutes.  The output is about 9000 lines.

Running the correspondind command:

find . \( -path \*/SCCS -o -path \*/RCS -o -path \*/CVS -o -path \*/MCVS -o -path \*/.svn -o -path \*/.git -o -path \*/.hg -o -path \*/.bzr -o -path \*/_MTN -o -path \*/_darcs -o -path \*/\{arch\} \) -prune -o -type f \( -name *.el \) -print0 | xargs -0 -e grep -i -nH -e emacs

from a shell (and redirecting the output to a file) takes less than one second.

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From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: Markus Triska <markus.triska <at> gmx.at>
Cc: 895-close <at> debbugs.gnu.org, Dan Nicolaescu <dann <at> ics.uci.edu>
Subject: Re: bug#895: slow processing of process output
Date: Thu, 30 Jun 2011 03:10:06 +0200

Markus Triska <markus.triska <at> gmx.at> writes:

> I can reproduce the problem on OSX, and could significantly improve the
> running time by setting process-connection-type to nil before doing the
> rgrep. Let rgrep.el consist of:
>
>    (grep-compute-defaults)
>    (setq process-connection-type nil)
>    (rgrep "emacs" "*.el" "~/emacs/lisp/")
>
>    (while (process-status "grep")
>      (sit-for 0.1))

I've now bound `process-connection-type' to nil in `rgrep' for Emacs 24.

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/

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