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[/] [openrisc/] [tags/] [gnu-dev/] [fsf-gcc-snapshot-1-mar-12/] [or1k-gcc/] [libstdc++-v3/] [testsuite/] [performance/] [27_io/] [ofstream_insert_float.cc] - Rev 783
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// Copyright (C) 2003, 2009, 2011 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 <fstream> #include <sstream> #include <testsuite_performance.h> // Based on libstdc++/8761 poor fstream performance (converted to float) void test_insertion(int p = 6) { using namespace std; using namespace __gnu_test; const char* filename = "tmp_perf_float.txt"; const int iterations = 10000000; ostringstream oss; oss << "precision " << p; { time_counter time; resource_counter resource; ofstream out(filename); out.precision(p); start_counters(time, resource); for (int i = 0; i < iterations; ++i) { float f = i * 3.14159265358979323846; out << f << '\n'; } stop_counters(time, resource); report_performance(__FILE__, oss.str(), time, resource); } unlink(filename); }; int main() { test_insertion(6); test_insertion(12); return 0; }