84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
// Copyright (C) 2003 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 2, 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 COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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#include <ctime>
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#include <iostream>
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#include <string>
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using namespace std;
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void
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test_append_char(int how_much)
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{
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string buf; // no preallocation
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for (int i = 0; i < how_much; ++i)
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buf.append(static_cast<string::size_type>(1) , 'x');
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}
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void
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test_append_string(int how_much)
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{
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string s(static_cast<string::size_type>(1) , 'x');
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string buf; // no preallocation
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for (int i = 0; i < how_much; ++i)
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buf.append(s);
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}
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void
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run_benchmark1(int how_much)
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{
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clock_t t0 = clock();
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test_append_char(how_much);
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clock_t t1 = clock();
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cout << "Execution time of " << how_much
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<< " string::append(char) calls: "
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<< (static_cast<float>(t1 - t0)/CLOCKS_PER_SEC) << " sec."<< endl;
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}
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void
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run_benchmark2(int how_much)
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{
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clock_t t0 = clock();
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test_append_string(how_much);
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clock_t t1 = clock();
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cout << "Execution time of " << how_much
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<< " string::append(const string&) calls: "
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<< (static_cast<float>(t1 - t0)/CLOCKS_PER_SEC) << " sec." << endl;
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}
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// libstdc++/5380
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// libstdc++/4960
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int main()
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{
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run_benchmark1(10000);
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run_benchmark2(10000);
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run_benchmark1(100000);
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run_benchmark2(100000);
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run_benchmark1(1000000);
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run_benchmark2(1000000);
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}
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