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