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Date:      Fri, 13 Aug 2010 15:33:00 +0400
From:      Anonymous <swell.k@gmail.com>
To:        Doug Barton <dougb@FreeBSD.org>
Cc:        freebsd-current@FreeBSD.org, Gabor Kovesdan <gabor@FreeBSD.org>
Subject:   Re: Official request: Please make GNU grep the default
Message-ID:  <86mxsq693n.fsf@gmail.com>
In-Reply-To: <4C6505A4.9060203@FreeBSD.org> (Doug Barton's message of "Fri, 13 Aug 2010 01:43:16 -0700")
References:  <4C6505A4.9060203@FreeBSD.org>

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Doug Barton <dougb@FreeBSD.org> writes:

[...]
> My reason is simple, performance. While doing some portmaster work
> recently I was regression testing some changes I made to the --index*
> options and noticed that things were dramatically slower than the last
> time I tested those features. Thinking that I had made a programming
> mistake I dug into my code, and while the regexps that I was using could
> be tuned for slightly better performance the problem was not in my code.
> I then installed textproc/gnugrep to compare, and the differences were
> very dramatic using a highly pessimized test case (finding a match on
> the last line of INDEX). The script I used to test is at
> http://people.freebsd.org/~dougb/grep-time-trial.sh.txt and a typical
> result was:
>
> GNU grep
> Elapsed time: 2 seconds
>
> BSD grep
> Elapsed time: 47 seconds

Why not allow people to use grep(1) from ports in portmaster, e.g. by
not overriding user-specified PATH?



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