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
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
// Copyright (C) 2005-2019 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library 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, or (at your option)
// any later version.
// This library 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 library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#include <unistd.h>
#include <cstdio>
#include <fstream>
#include <string>
#include <testsuite_performance.h>
// libstdc++/22515
int main()
{
using namespace std;
using namespace __gnu_test;
time_counter time;
resource_counter resource;
const char filename[] = "tmp_perf_chars.txt";
const unsigned lines = 200000;
const unsigned line_length = 200;
char* line = new char[line_length + 2];
// Construct data.
{
memset(line, 'x', line_length);
line[line_length] = '\n';
line[line_length + 1] = '\0';
ofstream out(filename);
for (unsigned i = 0; i < lines; ++i)
out << line;
}
// operator>>(basic_istream<char>& __in, basic_string<char>& __str)
{
start_counters(time, resource);
for (int iter = 0; iter < 25; ++iter)
{
ifstream file(filename);
string string_line;
while (file >> string_line);
}
stop_counters(time, resource);
report_performance(__FILE__, "string&", time, resource);
clear_counters(time, resource);
}
// operator>>(basic_istream<char>& __in, char* __s)
{
start_counters(time, resource);
for (int iter = 0; iter < 25; ++iter)
{
ifstream file(filename);
while (file >> line);
}
stop_counters(time, resource);
report_performance(__FILE__, "char*", time, resource);
clear_counters(time, resource);
}
delete[] line;
unlink(filename);
return 0;
}
|
