// Copyright (C) 2003-2017 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 // . #include #include #include #include using namespace std; void test_append_char(int how_much) { string buf; // no preallocation for (int i = 0; i < how_much; ++i) buf.append(static_cast(1) , 'x'); } void test_append_string(int how_much) { string s(static_cast(1) , 'x'); string buf; // no preallocation for (int i = 0; i < how_much; ++i) buf.append(s); } void run_benchmark1(int how_much) { using namespace __gnu_test; time_counter time; resource_counter resource; start_counters(time, resource); test_append_char(how_much); stop_counters(time, resource); report_performance(__FILE__, "char", time, resource); } void run_benchmark2(int how_much) { using namespace __gnu_test; time_counter time; resource_counter resource; start_counters(time, resource); test_append_string(how_much); stop_counters(time, resource); report_performance(__FILE__, "string", time, resource); } // libstdc++/5380 // libstdc++/4960 int main() { run_benchmark1(100000); run_benchmark2(100000); run_benchmark1(1000000); run_benchmark2(1000000); run_benchmark1(10000000); run_benchmark2(10000000); }