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From: "Cooper, Karl (US SSA)" <karl DOT cooper AT baesystems DOT com>
To: "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Date: Fri, 6 Nov 2009 09:12:54 -0500
Subject: RE: 1.7] BUG - GREP slows to a crawl with large number of matches     on a  single file
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Corinna Vinschen wrote:
> Or try LANG=3DC.ASCII since LANG=3DC will still return UTF-8 as charset
> when calling nl_langinfo(CHARSET).=20

Yes, this solves it:

$ time LC_ALL=3DC.ASCII grep dog testfile | wc
 100000  900000 4500000

real    0m0.359s
user    0m0.279s
sys     0m0.232s

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