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https://github.com/autc04/Retro68.git
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60 lines
1.6 KiB
C++
60 lines
1.6 KiB
C++
// Copyright (C) 2003, 2009, 2011 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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#include <unistd.h>
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#include <fstream>
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#include <sstream>
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#include <testsuite_performance.h>
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// Based on libstdc++/8761 poor fstream performance (converted to float)
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void test_insertion(int p = 6)
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{
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using namespace std;
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using namespace __gnu_test;
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const char* filename = "tmp_perf_float.txt";
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const int iterations = 10000000;
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ostringstream oss;
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oss << "precision " << p;
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{
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time_counter time;
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resource_counter resource;
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ofstream out(filename);
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out.precision(p);
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start_counters(time, resource);
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for (int i = 0; i < iterations; ++i)
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{
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float f = i * 3.14159265358979323846;
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out << f << '\n';
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}
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stop_counters(time, resource);
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report_performance(__FILE__, oss.str(), time, resource);
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}
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unlink(filename);
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};
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int main()
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{
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test_insertion(6);
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test_insertion(12);
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return 0;
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}
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