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bug#895: slow processing of process output

From: Dan Nicolaescu
Subject: bug#895: slow processing of process output
Date: Wed, 06 Jul 2011 11:32:57 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux)

Lars Magne Ingebrigtsen <address@hidden> writes:

> Markus Triska <address@hidden> 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.

This might solve the specific `rgrep' case, but that was only a specific
easy to reproduce example.
Processing process output is slow for other things too.
For example compare the time to run
make bootstrap
when using M-x compile

vs doing it in an xterm.

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