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47 lines
1.4 KiB
Plaintext
47 lines
1.4 KiB
Plaintext
# determine whether it's worthwhile to add a --line-length=N option to sort.
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# Copyright (C) 1997 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Add the option and perform this test:
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#
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# Test method:
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# ==============
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n_bytes=10000000
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time=/bin/time
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for line_len in 80 200 400 800 3000; do
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echo "line length: $line_len"
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write-file-of-size --bytes=$n_bytes --line-length=$line_len > in
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# sort a file with $n-char lines using the default of N=30
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$time sort in > x
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# sort the same file with --line-length=$n
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SORT_INITIAL_LINE_LENGTH=`expr $line_len + 1` $time sort in > x
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echo
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# compare run times
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done
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# do this on at least SunOS, Linux, Solaris
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# RESULTS:
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# Solaris5.5.1, x86 dual PPro/200: none
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# Linux 3.0.29 x86 P/100: 5-6% improvement for 80, 200, 400,
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# but 1-2% penalty for 800 and 3000
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