Date: Fri, 13 Aug 2010 11:08:05 +0200 From: Gabor Kovesdan <gabor@FreeBSD.org> To: Doug Barton <dougb@FreeBSD.org> Cc: core@FreeBSD.org, delphij@FreeBSD.org, current@FreeBSD.org Subject: Re: Official request: Please make GNU grep the default Message-ID: <4C650B75.3020800@FreeBSD.org> In-Reply-To: <4C6505A4.9060203@FreeBSD.org> References: <4C6505A4.9060203@FreeBSD.org>
next in thread | previous in thread | raw e-mail | index | archive | help
Em 2010.08.13. 10:43, Doug Barton escreveu: > 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 > Ok, I'll take care of this soon, and make GNU grep default, again with a knob to build BSD grep. I agree with you that we cannot allow such a big performance drawback but I my measures only showed significant differences for very big searches and I didn't imagine that it could add up to such a big diference. I'm sorry for the bad decision I took making it default. Gabor
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4C650B75.3020800>