1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
# determine whether it's worthwhile to add a --line-length=N option to sort.
# Copyright (C) 1997 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.
# Add the option and perform this test:
#
# Test method:
# ==============
n_bytes=10000000
time=/bin/time
for line_len in 80 200 400 800 3000; do
echo "line length: $line_len"
write-file-of-size --bytes=$n_bytes --line-length=$line_len > in
# sort a file with $n-char lines using the default of N=30
$time sort in > x
# sort the same file with --line-length=$n
SORT_INITIAL_LINE_LENGTH=`expr $line_len + 1` $time sort in > x
echo
# compare run times
done
# do this on at least SunOS, Linux, Solaris
# RESULTS:
# Solaris5.5.1, x86 dual PPro/200: none
# Linux 3.0.29 x86 P/100: 5-6% improvement for 80, 200, 400,
# but 1-2% penalty for 800 and 3000
|
