Date: Fri, 13 Aug 2010 15:23:35 +0200 From: Gabor Kovesdan <gabor@FreeBSD.org> To: Anonymous <swell.k@gmail.com> Cc: freebsd-current@FreeBSD.org, Doug Barton <dougb@FreeBSD.org> Subject: Re: Official request: Please make GNU grep the default Message-ID: <4C654757.2040804@FreeBSD.org> In-Reply-To: <86mxsq693n.fsf@gmail.com> References: <4C6505A4.9060203@FreeBSD.org> <86mxsq693n.fsf@gmail.com>
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Em 2010.08.13. 13:33, Anonymous escreveu: > 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? > It would be a working solution but having seen the performance issue, it may also cause troubles elsewhere. Gabor
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