Hello All, Today I've basically terminated te feature-completion of the BSD-licensed grep from OpenBSD. It means, that I've accomplished the following tasks: - Implement --label - Implement --null - Implement --color / --colour - Implement -D / --devices - Implement -H / --with-filename - Implement -J / --bz2decompress - Implement -d / --directories - Implement -m / --max-count - Implement -o / --only-matching - Add --help - Eliminate warnings - style(9) cleanup I've made some preliminary tests with the fgrep and normal grep behaviour and it seems that they can achieve the same speed: /usr/bin/time -h gnugrep -e ^\#define -r /usr/include/ 24.06s real 0.11s user 0.17s sys 24.46s real 0.11s user 0.16s sys 24.37s real 0.11s user 0.16s sys 23.73s real 0.09s user 0.19s sys 23.97s real 0.06s user 0.21s sys /usr/bin/time -h bsdgrep -e ^\#define -r /usr/include/ 23.56s real 0.27s user 0.23s sys 23.40s real 0.28s user 0.21s sys 23.64s real 0.30s user 0.18s sys 23.70s real 0.30s user 0.23s sys 23.92s real 0.28s user 0.22s sys /usr/bin/time -h gnugrep -e int -r /usr/include/ 18.44s real 0.10s user 0.14s sys 18.19s real 0.09s user 0.14s sys 18.01s real 0.09s user 0.15s sys 18.10s real 0.10s user 0.14s sys 18.91s real 0.06s user 0.18s sys /usr/bin/time -h bsdgrep -e int -r /usr/include/ 18.39s real 0.12s user 0.19s sys 18.33s real 0.14s user 0.17s sys 18.26s real 0.11s user 0.20s sys 18.07s real 0.10s user 0.21s sys 17.97s real 0.14s user 0.16s sys What remains is to do more test about the performance and the compatibility with the GNU version. You can test this version easily by installing the textproc/bsdgrep port, which creates two symlinks: bsdgrep points to this version and gnugrep points to the base grep. Any help and comments are welcome. Regards, Gábor Kövedán P.S.: Acknowledgements are going to Max Khon, who is my mentor in this program, to Diomidis Spinellis due to the his useful comments and to Sean C. Farley who worked on this implementation of grep before and provided some preliminary comments and suggestions before I started working on this project, and of course, to Google for sponsoring this piece of work.
attached mail follows:
gabor 2008-06-14 23:06:19 UTC FreeBSD ports repository Modified files: textproc/bsdgrep Makefile distinfo Log: - Update to 20080615 This version is now supposed to be compatible with GNU grep 2.5.1, which can be found in FreeBSD. According to some preliminary measurements, they achieve almost the same level of efficiency, this version seem to be measureably but not significantly faster. Further tests are needed to test and examine this version of grep. Revision Changes Path 1.5 +1 -1 ports/textproc/bsdgrep/Makefile 1.5 +3 -3 ports/textproc/bsdgrep/distinfoReceived on Sat Jun 14 2008 - 21:43:17 UTC
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