1// Copyright (C) 2003-2015 Free Software Foundation, Inc.
2//
3// This file is part of the GNU ISO C++ Library.  This library is free
4// software; you can redistribute it and/or modify it under the
5// terms of the GNU General Public License as published by the
6// Free Software Foundation; either version 3, or (at your option)
7// any later version.
8
9// This library is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12// GNU General Public License for more details.
13
14// You should have received a copy of the GNU General Public License along
15// with this library; see the file COPYING3.  If not see
16// <http://www.gnu.org/licenses/>.
17
18#include <unistd.h>
19#include <fstream>
20#include <sstream>
21#include <testsuite_performance.h>
22
23// Based on libstdc++/8761 poor fstream performance (converted to float)
24void test_insertion(int p = 6)
25{
26  using namespace std;
27  using namespace __gnu_test;
28
29  const char* filename = "tmp_perf_float.txt";
30  const int iterations = 10000000;
31
32  ostringstream oss;
33  oss << "precision " << p;
34
35  {
36    time_counter time;
37    resource_counter resource;
38
39    ofstream out(filename);
40    out.precision(p);
41    start_counters(time, resource);
42    for (int i = 0; i < iterations; ++i)
43      {
44	float f = i * 3.14159265358979323846;
45	out << f << '\n';
46      }
47    stop_counters(time, resource);
48    report_performance(__FILE__, oss.str(), time, resource);
49  }
50
51  unlink(filename);
52};
53
54int main()
55{
56  test_insertion(6);
57  test_insertion(12);
58  return 0;
59}
60