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.
--- Begin Message ---
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/distinfo
--- End Message ---
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