libs/multiprecision/performance/voronoi_performance.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 //  Copyright 2012 John Maddock. Distributed under the Boost
   3 //  Software License, Version 1.0. (See accompanying file
   4 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #ifdef _MSC_VER
   7 #pragma warning(disable : 4244)
   8 #endif
   9
  10 #include <boost/polygon/detail/voronoi_predicates.hpp>
  11 #include <boost/polygon/detail/voronoi_structures.hpp>
  12 #include <boost/polygon/detail/skeleton_predicates.hpp>
  13 #include <boost/random/mersenne_twister.hpp>
  14 #include <boost/random/uniform_int_distribution.hpp>
  15 #include <vector>
  16 #include <map>
  17 #include <boost/chrono.hpp>
  18 #include <boost/multiprecision/cpp_int.hpp>
  19
  20 #ifdef TEST_GMP
  21 #include <boost/multiprecision/gmp.hpp>
  22 #endif
  23 #ifdef TEST_TOMMATH
  24 #include <boost/multiprecision/tommath.hpp>
  25 #endif
  26
  27 #include "arithmetic_backend.hpp"
  28
  29 typedef boost::polygon::detail::point_2d<boost::int32_t> i_point;
  30
  31 template <class Clock>
  32 struct stopwatch
  33 {
  34    typedef typename Clock::duration duration;
  35    stopwatch()
  36    {
  37       m_start = Clock::now();
  38    }
  39    duration elapsed()
  40    {
  41       return Clock::now() - m_start;
  42    }
  43    void reset()
  44    {
  45       m_start = Clock::now();
  46    }
  47
  48  private:
  49    typename Clock::time_point m_start;
  50 };
  51
  52 std::vector<i_point>   points;
  53 boost::random::mt19937 gen;
  54
  55 template <class Big>
  56 struct cpp_int_voronoi_traits
  57 {
  58    typedef boost::int32_t                                          int_type;
  59    typedef boost::int64_t                                          int_x2_type;
  60    typedef boost::uint64_t                                         uint_x2_type;
  61    typedef Big                                                     big_int_type;
  62    typedef double                                                  fpt_type;
  63    typedef boost::polygon::detail::extended_exponent_fpt<fpt_type> efpt_type;
  64    typedef boost::polygon::detail::ulp_comparison<fpt_type>        ulp_cmp_type;
  65    struct to_fpt_converter_type
  66    {
  67       template <class B, boost::multiprecision::expression_template_option ET>
  68       double operator()(const boost::multiprecision::number<B, ET>& val)
  69       {
  70          return val.template convert_to<double>();
  71       }
  72       double operator()(double val)
  73       {
  74          return val;
  75       }
  76       double operator()(const efpt_type& that) const
  77       {
  78          return that.d();
  79       }
  80       template <class tag, class Arg1, class Arg2, class Arg3, class Arg4>
  81       double operator()(const boost::multiprecision::detail::expression<tag, Arg1, Arg2, Arg3, Arg4>& e)
  82       {
  83          typedef typename boost::multiprecision::detail::expression<tag, Arg1, Arg2, Arg3, Arg4>::result_type r_t;
  84          r_t                                                                                                  r(e);
  85          return r.template convert_to<double>();
  86       }
  87    };
  88    struct to_efpt_converter_type
  89    {
  90       template <class B, boost::multiprecision::expression_template_option ET>
  91       efpt_type operator()(const boost::multiprecision::number<B, ET>& val)
  92       {
  93          return efpt_type(val.template convert_to<double>(), 0);
  94       }
  95       efpt_type operator()(double val)
  96       {
  97          return efpt_type(val, 0);
  98       }
  99       template <class tag, class Arg1, class Arg2, class Arg3, class Arg4>
 100       double operator()(const boost::multiprecision::detail::expression<tag, Arg1, Arg2, Arg3, Arg4>& e)
 101       {
 102          typedef typename boost::multiprecision::detail::expression<tag, Arg1, Arg2, Arg3, Arg4>::result_type r_t;
 103          r_t                                                                                                  r(e);
 104          return efpt_type(r.template convert_to<double>(), 0);
 105       }
 106    };
 107 };
 108
 109 template <class Big>
 110 struct native_int_voronoi_traits
 111 {
 112    typedef boost::int32_t                                          int_type;
 113    typedef boost::int64_t                                          int_x2_type;
 114    typedef boost::uint64_t                                         uint_x2_type;
 115    typedef Big                                                     big_int_type;
 116    typedef double                                                  fpt_type;
 117    typedef boost::polygon::detail::extended_exponent_fpt<fpt_type> efpt_type;
 118    typedef boost::polygon::detail::ulp_comparison<fpt_type>        ulp_cmp_type;
 119    struct to_fpt_converter_type
 120    {
 121       template <class T>
 122       double operator()(const T& val) const
 123       {
 124          return val;
 125       }
 126       double operator()(const efpt_type& that) const
 127       {
 128          return that.d();
 129       }
 130    };
 131    struct to_efpt_converter_type
 132    {
 133       template <class T>
 134       efpt_type operator()(const T& val) const
 135       {
 136          return efpt_type(val, 0);
 137       }
 138    };
 139 };
 140
 141 std::map<std::string, double> results;
 142 double                        min_time = (std::numeric_limits<double>::max)();
 143
 144 template <class Traits>
 145 double test(const char* name)
 146 {
 147    typedef boost::polygon::detail::voronoi_predicates<Traits>                             preds;
 148    typedef boost::polygon::detail::circle_event<boost::int32_t>                           circle_event;
 149    typedef boost::polygon::detail::site_event<boost::int32_t>                             site_event;
 150    typedef typename preds::template mp_circle_formation_functor<site_event, circle_event> circle_pred;
 151
 152    boost::random::uniform_int_distribution<> dist(0, points.size() - 1);
 153    circle_pred                               pc;
 154    circle_event                              event;
 155
 156    stopwatch<boost::chrono::high_resolution_clock> w;
 157
 158    for (unsigned i = 0; i < 10000; ++i)
 159    {
 160       site_event s1(points[dist(gen)]);
 161       site_event s2(points[dist(gen)]);
 162       site_event s3(points[dist(gen)]);
 163       pc.ppp(s1, s2, s3, event);
 164       pc.pps(s1, s2, s3, 0, event);
 165       pc.pss(s1, s2, s3, 0, event);
 166       pc.sss(s1, s2, s3, event);
 167    }
 168    double d = boost::chrono::duration_cast<boost::chrono::duration<double> >(w.elapsed()).count();
 169    if (d < min_time)
 170       min_time = d;
 171    results[name] = d;
 172    std::cout << "Time for " << std::setw(30) << std::left << name << " = " << d << std::endl;
 173    return d;
 174 }
 175
 176 void generate_quickbook()
 177 {
 178    std::cout << "[table\n[[Integer Type][Relative Performance (Actual time in parenthesis)]]\n";
 179
 180    std::map<std::string, double>::const_iterator i(results.begin()), j(results.end());
 181
 182    while (i != j)
 183    {
 184       double rel = i->second / min_time;
 185       std::cout << "[[" << i->first << "][" << rel << "(" << i->second << "s)]]\n";
 186       ++i;
 187    }
 188
 189    std::cout << "]\n";
 190 }
 191
 192 int main()
 193 {
 194    boost::random::uniform_int_distribution<> dist((std::numeric_limits<boost::int32_t>::min)() / 2, (std::numeric_limits<boost::int32_t>::max)() / 2);
 195
 196    for (unsigned i = 0; i < 100; ++i)
 197    {
 198       points.push_back(i_point(dist(gen), dist(gen)));
 199    }
 200
 201    test<boost::polygon::detail::voronoi_ctype_traits<boost::int32_t> >("extended_int");
 202
 203    test<cpp_int_voronoi_traits<boost::multiprecision::int256_t> >("int256_t");
 204    test<cpp_int_voronoi_traits<boost::multiprecision::int512_t> >("int512_t");
 205    test<cpp_int_voronoi_traits<boost::multiprecision::int1024_t> >("int1024_t");
 206
 207    test<cpp_int_voronoi_traits<boost::multiprecision::checked_int256_t> >("checked_int256_t");
 208    test<cpp_int_voronoi_traits<boost::multiprecision::checked_int512_t> >("checked_int512_t");
 209    test<cpp_int_voronoi_traits<boost::multiprecision::checked_int1024_t> >("checked_int1024_t");
 210
 211    test<cpp_int_voronoi_traits<boost::multiprecision::number<boost::multiprecision::cpp_int_backend<>, boost::multiprecision::et_off> > >("cpp_int");
 212
 213 #ifdef TEST_GMP
 214    test<cpp_int_voronoi_traits<boost::multiprecision::number<boost::multiprecision::gmp_int, boost::multiprecision::et_off> > >("mpz_int");
 215 #endif
 216 #ifdef TEST_TOMMATH
 217    test<cpp_int_voronoi_traits<boost::multiprecision::number<boost::multiprecision::tommath_int, boost::multiprecision::et_off> > >("tom_int");
 218 #endif
 219
 220    generate_quickbook();
 221
 222    test<native_int_voronoi_traits<boost::int64_t> >("int64_t");
 223    test<cpp_int_voronoi_traits<boost::multiprecision::number<boost::multiprecision::arithmetic_backend<boost::int64_t>, boost::multiprecision::et_off> > >("number<arithmetic_backend<boost::int64_t>, et_off>");
 224    //test<cpp_int_voronoi_traits<boost::multiprecision::number<boost::multiprecision::arithmetic_backend<boost::int64_t>, boost::multiprecision::et_on> > >("number<arithmetic_backend<boost::int64_t>, et_on>");
 225
 226    return 0;
 227 }