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83ffe9cd | 1 | // Copyright (C) 2003-2023 Free Software Foundation, Inc. |
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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 | |
748086b7 | 6 | // Free Software Foundation; either version 3, or (at your option) |
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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 | |
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15 | // with this library; see the file COPYING3. If not see |
16 | // <http://www.gnu.org/licenses/>. | |
ca5e1be8 | 17 | |
c7c2e831 | 18 | #include <unistd.h> |
ca5e1be8 | 19 | #include <fstream> |
070ce57b | 20 | #include <sstream> |
ce4f8c6b | 21 | #include <testsuite_performance.h> |
ca5e1be8 | 22 | |
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23 | // Based on libstdc++/8761 poor fstream performance (converted to float) |
24 | void test_insertion(int p = 6) | |
ca5e1be8 | 25 | { |
ce4f8c6b | 26 | using namespace std; |
aecf642c | 27 | using namespace __gnu_test; |
ce4f8c6b | 28 | |
070ce57b | 29 | const char* filename = "tmp_perf_float.txt"; |
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30 | const int iterations = 10000000; |
31 | ||
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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); | |
ca5e1be8 | 52 | }; |
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53 | |
54 | int main() | |
55 | { | |
56 | test_insertion(6); | |
57 | test_insertion(12); | |
58 | return 0; | |
59 | } |