ceph/src/boost/libs/compute/perf/perf_stl_find_end.cpp

   1 //---------------------------------------------------------------------------//
   2 // Copyright (c) 2014 Roshan <thisisroshansmail@gmail.com>
   3 //
   4 // Distributed under the Boost Software License, Version 1.0
   5 // See accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt
   7 //
   8 // See http://boostorg.github.com/compute for more information.
   9 //---------------------------------------------------------------------------//
  10
  11 #include <algorithm>
  12 #include <iostream>
  13 #include <numeric>
  14 #include <vector>
  15
  16 #include "perf.hpp"
  17
  18 int rand_int()
  19 {
  20     return static_cast<int>((rand() / double(RAND_MAX)) * 25.0);
  21 }
  22
  23 int main(int argc, char *argv[])
  24 {
  25     perf_parse_args(argc, argv);
  26     std::cout << "size: " << PERF_N << std::endl;
  27
  28     // create vector of random numbers on the host
  29     std::vector<int> host_vector(PERF_N);
  30     std::generate(host_vector.begin(), host_vector.end(), rand_int);
  31
  32     int pattern[] = {2, 6, 6, 7, 8, 4};
  33
  34     perf_timer t;
  35     for(size_t trial = 0; trial < PERF_TRIALS; trial++){
  36         t.start();
  37         std::find_end(host_vector.begin(), host_vector.end(),
  38                         pattern, pattern + 6);
  39         t.stop();
  40     }
  41     std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl;
  42
  43     return 0;
  44 }