libstdc++-v3/testsuite/util/performance/priority_queue/timing/join_test.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005-2018 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the terms
   7 // of the GNU General Public License as published by the Free Software
   8 // Foundation; either version 3, or (at your option) any later
   9 // version.
  10
  11 // This library is distributed in the hope that it will be useful, but
  12 // WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 // General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License
  17 // along with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20
  21 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  22
  23 // Permission to use, copy, modify, sell, and distribute this software
  24 // is hereby granted without fee, provided that the above copyright
  25 // notice appears in all copies, and that both that copyright notice
  26 // and this permission notice appear in supporting documentation. None
  27 // of the above authors, nor IBM Haifa Research Laboratories, make any
  28 // representation about the suitability of this software for any
  29 // purpose. It is provided "as is" without express or implied
  30 // warranty.
  31
  32 /**
  33  * @file join_test.hpp
  34  * Contains a join performance test.
  35  */
  36
  37 #ifndef PB_DS_JOIN_TEST_HPP
  38 #define PB_DS_JOIN_TEST_HPP
  39
  40 #include <performance/time/timing_test_base.hpp>
  41 #include <ext/pb_ds/detail/type_utils.hpp>
  42 #include <performance/io/xml_formatter.hpp>
  43 #include <common_type/priority_queue/string_form.hpp>
  44 #include <iterator>
  45
  46 namespace __gnu_pbds
  47 {
  48   namespace test
  49   {
  50     namespace detail
  51     {
  52       template<typename It, typename Cntnr>
  53       class double_push_functor
  54       {
  55         const It _M_begin;
  56         const It _M_end;
  57
  58       public:
  59         double_push_functor(It b,  It e) : _M_begin(b), _M_end(e) { }
  60
  61         void
  62         operator()(std::size_t resolution)
  63         {
  64           typedef typename Cntnr::const_reference const_reference;
  65           for (std::size_t n = 0; n < resolution; ++n)
  66             {
  67               Cntnr c0;
  68               Cntnr c1;
  69               for (It it = _M_begin; it != _M_end; ++it)
  70                 {
  71                   c0.push(const_reference(it->first));
  72                   c1.push(const_reference(it->first));
  73                 }
  74             }
  75         }
  76       };
  77
  78       template<typename It, typename Cntnr>
  79       class double_push_join_functor
  80       {
  81         const It _M_begin;
  82         const It _M_end;
  83
  84       public:
  85         double_push_join_functor(It b,  It e) : _M_begin(b), _M_end(e) { }
  86
  87         void
  88         operator()(std::size_t resolution)
  89         {
  90           typedef typename Cntnr::const_reference const_reference;
  91           for (std::size_t n = 0; n < resolution; ++n)
  92             {
  93               Cntnr c0;
  94               Cntnr c1;
  95               for (It it = _M_begin; it != _M_end; ++it)
  96                 {
  97                   c0.push(const_reference(it->first));
  98                   c1.push(const_reference(it->first));
  99                 }
 100               c0.join(c1);
 101             }
 102         }
 103       };
 104     } // namespace detail
 105
 106     template<typename It>
 107     class join_test : private __gnu_pbds::test::detail::timing_test_base
 108     {
 109     public:
 110       join_test(It ins_b, size_t ins_vn, size_t ins_vs, size_t ins_vm)
 111       : m_ins_b(ins_b), m_ins_vn(ins_vn), m_ins_vs(ins_vs), m_ins_vm(ins_vm)
 112       { }
 113
 114       template<typename Cntnr>
 115       void
 116       operator()(Cntnr)
 117       {
 118         using __gnu_pbds::test::detail::double_push_functor;
 119         using __gnu_pbds::test::detail::double_push_join_functor;
 120         typedef __gnu_pbds::test::detail::timing_test_base base_type;
 121         typedef double_push_functor<It, Cntnr> psh_fnct;
 122         typedef double_push_join_functor<It, Cntnr> psh_jn_fnct;
 123
 124         typedef xml_result_set_performance_formatter formatter_type;
 125         formatter_type res(string_form<Cntnr>::name(),
 126                            string_form<Cntnr>::desc());
 127
 128         for (size_t n = 0; m_ins_vn + n*  m_ins_vs < m_ins_vm; ++n)
 129           {
 130             const size_t v = m_ins_vn + n *  m_ins_vs;
 131             It b = m_ins_b;
 132             It e = m_ins_b;
 133             std::advance(e, v);
 134
 135             psh_fnct double_push_fn(b, e);
 136             const double dbl_psh_res = base_type::operator()(double_push_fn);
 137             psh_jn_fnct dbl_psh_jn_fn(b, e);
 138             const double dbl_psh_jn_res = base_type::operator()(dbl_psh_jn_fn);
 139             const double min_res = double(timing_test_base::min_time_res());
 140             const double effective_delta = std::max(dbl_psh_jn_res - dbl_psh_res, min_res);
 141             res.add_res(v, effective_delta / v);
 142           }
 143       }
 144
 145     private:
 146       join_test(const join_test&);
 147
 148       template<typename Cntnr>
 149       void
 150       join(Cntnr, It b, It e)
 151       {
 152         Cntnr cntnr;
 153         typedef typename Cntnr::const_reference const_reference;
 154         for (It it = b; it != e; ++it)
 155           cntnr.join(const_reference(*it));
 156       }
 157
 158       const It          m_ins_b;
 159       const size_t      m_ins_vn;
 160       const size_t      m_ins_vs;
 161       const size_t      m_ins_vm;
 162     };
 163   } // namespace test
 164 } // namespace __gnu_pbds
 165
 166 #endif
 167