X-Git-Url: https://oss.titaniummirror.com/gitweb?a=blobdiff_plain;f=libstdc%2B%2B-v3%2Ftestsuite%2Fperformance%2F25_algorithms%2Fnth_element_worst_case.cc;fp=libstdc%2B%2B-v3%2Ftestsuite%2Fperformance%2F25_algorithms%2Fnth_element_worst_case.cc;h=a405f9ea9e9b896a8ad89411ba1d1cbdd33ef6ae;hb=6fed43773c9b0ce596dca5686f37ac3fc0fa11c0;hp=0000000000000000000000000000000000000000;hpb=27b11d56b743098deb193d510b337ba22dc52e5c;p=msp430-gcc.git diff --git a/libstdc++-v3/testsuite/performance/25_algorithms/nth_element_worst_case.cc b/libstdc++-v3/testsuite/performance/25_algorithms/nth_element_worst_case.cc new file mode 100644 index 00000000..a405f9ea --- /dev/null +++ b/libstdc++-v3/testsuite/performance/25_algorithms/nth_element_worst_case.cc @@ -0,0 +1,53 @@ +// Copyright (C) 2006, 2009 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 + +int main() +{ + using namespace __gnu_test; + + time_counter time; + resource_counter resource; + + const int max_size = 8192; + + std::vector v[max_size]; + + for (int i = 0; i < max_size; ++i) + { + for (int j = 0; j < i; j += 4) + { + v[i].push_back(j / 2); + v[i].push_back((i - 2) - (j / 2)); + } + + for (int j = 1; j < i; j += 2) + v[i].push_back(j); + } + + start_counters(time, resource); + for (int i = 0; i < max_size; ++i) + std::nth_element(v[i].begin(), v[i].begin() + i, v[i].end()); + stop_counters(time, resource); + report_performance(__FILE__, "", time, resource); + + return 0; +}