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Date: Fri, 6 Nov 2009 15:22:47 -0700
Message-ID: <806a89db0911061422l290ff84u3d58cbbe1d3eface@mail.gmail.com>
Subject: Re: 1.7] BUG - GREP slows to a crawl with large number of matches on  	a single file
From: Jim Reisert AD1C <jjreisert AT alum DOT mit DOT edu>
To: cygwin AT cygwin DOT com
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On Fri, Nov 6, 2009 at 7:12 AM, Cooper, Karl (US SSA)
<karl DOT cooper AT baesystems DOT com> wrote:

> Corinna Vinschen wrote:
>> Or try LANG=3DC.ASCII since LANG=3DC will still return UTF-8 as charset
>> when calling nl_langinfo(CHARSET).
>
> Yes, this solves it:
>
> $ time LC_ALL=3DC.ASCII grep dog testfile | wc
> =A0100000 =A0900000 4500000
>
> real =A0 =A00m0.359s
> user =A0 =A00m0.279s
> sys =A0 =A0 0m0.232s


I just tried this on my system, I routinely grep groups of files
containing 100K lines.  I was *astounded* how fast "grep" is after
setting LC_ALL=3DC.ASCII !

--=20
Jim Reisert AD1C, <jjreisert AT alum DOT mit DOT edu>, http://www.ad1c.us

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