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

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005, 2006 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 2, 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 COPYING.  If not, write to
  18 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
  19 // MA 02111-1307, USA.
  20
  21 // As a special exception, you may use this file as part of a free
  22 // software library without restriction.  Specifically, if other files
  23 // instantiate templates or use macros or inline functions from this
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  25 // produce an executable, this file does not by itself cause the
  26 // resulting executable to be covered by the GNU General Public
  27 // License.  This exception does not however invalidate any other
  28 // reasons why the executable file might be covered by the GNU General
  29 // Public License.
  30
  31 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  32
  33 // Permission to use, copy, modify, sell, and distribute this software
  34 // is hereby granted without fee, provided that the above copyright
  35 // notice appears in all copies, and that both that copyright notice
  36 // and this permission notice appear in supporting documentation. None
  37 // of the above authors, nor IBM Haifa Research Laboratories, make any
  38 // representation about the suitability of this software for any
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  40 // warranty.
  41
  42 /**
  43  * @file join_test.hpp
  44  * Contains a join performance test.
  45  */
  46
  47 #ifndef PB_DS_JOIN_TEST_HPP
  48 #define PB_DS_JOIN_TEST_HPP
  49
  50 #include <performance/time/timing_test_base.hpp>
  51 #include <ext/pb_ds/detail/type_utils.hpp>
  52 #include <performance/io/xml_formatter.hpp>
  53 #include <common_type/priority_queue/string_form.hpp>
  54 #include <iterator>
  55
  56 namespace __gnu_pbds
  57 {
  58   namespace test
  59   {
  60     namespace detail
  61     {
  62       template<typename It, typename Cntnr>
  63       class double_push_functor
  64       {
  65         const It _M_begin;
  66         const It _M_end;
  67
  68       public:
  69         double_push_functor(It b,  It e) : _M_begin(b), _M_end(e) { }
  70
  71         void
  72         operator()(std::size_t resolution)
  73         {
  74           typedef typename Cntnr::const_reference const_reference;
  75           for (std::size_t n = 0; n < resolution; ++n)
  76             {
  77               Cntnr c0;
  78               Cntnr c1;
  79               for (It it = _M_begin; it != _M_end; ++it)
  80                 {
  81                   c0.push(const_reference(it->first));
  82                   c1.push(const_reference(it->first));
  83                 }
  84             }
  85         }
  86       };
  87
  88       template<typename It, typename Cntnr>
  89       class double_push_join_functor
  90       {
  91         const It _M_begin;
  92         const It _M_end;
  93
  94       public:
  95         double_push_join_functor(It b,  It e) : _M_begin(b), _M_end(e) { }
  96
  97         void
  98         operator()(std::size_t resolution)
  99         {
 100           typedef typename Cntnr::const_reference const_reference;
 101           for (std::size_t n = 0; n < resolution; ++n)
 102             {
 103               Cntnr c0;
 104               Cntnr c1;
 105               for (It it = _M_begin; it != _M_end; ++it)
 106                 {
 107                   c0.push(const_reference(it->first));
 108                   c1.push(const_reference(it->first));
 109                 }
 110               c0.join(c1);
 111             }
 112         }
 113       };
 114     } // namespace detail
 115
 116     template<typename It>
 117     class join_test : private __gnu_pbds::test::detail::timing_test_base
 118     {
 119     public:
 120       join_test(It ins_b, size_t ins_vn, size_t ins_vs, size_t ins_vm)
 121       : m_ins_b(ins_b), m_ins_vn(ins_vn), m_ins_vs(ins_vs), m_ins_vm(ins_vm)
 122       { }
 123
 124       template<typename Cntnr>
 125       void
 126       operator()(Cntnr)
 127       {
 128         using __gnu_pbds::test::detail::double_push_functor;
 129         using __gnu_pbds::test::detail::double_push_join_functor;
 130         typedef __gnu_pbds::test::detail::timing_test_base base_type;
 131         typedef double_push_functor<It, Cntnr> psh_fnct;
 132         typedef double_push_join_functor<It, Cntnr> psh_jn_fnct;
 133
 134         typedef xml_result_set_performance_formatter formatter_type;
 135         formatter_type res(string_form<Cntnr>::name(),
 136                            string_form<Cntnr>::desc());
 137
 138         for (size_t n = 0; m_ins_vn + n*  m_ins_vs < m_ins_vm; ++n)
 139           {
 140             const size_t v = m_ins_vn + n *  m_ins_vs;
 141             It b = m_ins_b;
 142             It e = m_ins_b;
 143             std::advance(e, v);
 144
 145             psh_fnct double_push_fn(b, e);
 146             const double dbl_psh_res = base_type::operator()(double_push_fn);
 147             psh_jn_fnct dbl_psh_jn_fn(b, e);
 148             const double dbl_psh_jn_res = base_type::operator()(dbl_psh_jn_fn);
 149             const double min_res = double(timing_test_base::min_time_res());
 150             const double effective_delta = std::max(dbl_psh_jn_res - dbl_psh_res, min_res);
 151             res.add_res(v, effective_delta / v);
 152           }
 153       }
 154
 155     private:
 156       join_test(const join_test&);
 157
 158       template<typename Cntnr>
 159       void
 160       join(Cntnr, It b, It e)
 161       {
 162         Cntnr cntnr;
 163         typedef typename Cntnr::const_reference const_reference;
 164         for (It it = b; it != e; ++it)
 165           cntnr.join(const_reference(*it));
 166       }
 167
 168       const It          m_ins_b;
 169       const size_t      m_ins_vn;
 170       const size_t      m_ins_vs;
 171       const size_t      m_ins_vm;
 172     };
 173   } // namespace test
 174 } // namespace __gnu_pbds
 175
 176 #endif
 177