tests/sort/sort-benchmark-random.sh

   1 #!/bin/sh
   2 # Benchmark sort on randomly generated data.
   3
   4 # Copyright (C) 2010-2024 Free Software Foundation, Inc.
   5
   6 # This program is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
  18
  19 # Written by Glen Lenker.
  20
  21 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
  22 print_ver_ sort
  23 require_perl_
  24
  25 very_expensive_
  26
  27 $PERL -e '
  28 my $num_lines = 500000;
  29 my $length = 100;
  30
  31 for (my $i=0; $i < $num_lines; $i++)
  32 {
  33     for (my $j=0; $j < $length; $j++)
  34     {
  35       printf "%c", 32 + rand(94);
  36     }
  37     print "\n";
  38 }' > in || framework_failure_
  39
  40 # We need to generate a lot of data for sort to show a noticeable
  41 # improvement in performance. Sorting it in PERL may take awhile.
  42
  43 $PERL -e '
  44 open (FILE, "<in");
  45 my @list = <FILE>;
  46 print sort(@list);
  47 close (FILE);
  48 ' > exp || framework_failure_
  49
  50 time sort in > out || fail=1
  51
  52 compare exp out || fail=1
  53
  54 Exit $fail