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/*=============================================================================
Copyright (c) 2001-2006 Joel de Guzman
Copyright (c) 2006-2007 Tobias Schwinger
Use modification and distribution are subject to the Boost Software
License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
http://www.boost.org/LICENSE_1_0.txt).
==============================================================================*/
#include <boost/fusion/container/list.hpp>
#include <boost/fusion/container/vector.hpp>
#include <boost/fusion/algorithm/iteration/fold.hpp>
#include <boost/fusion/functional/adapter/unfused_generic.hpp>
#include <boost/fusion/functional/adapter/unfused_rvalue_args.hpp>
#include <boost/fusion/functional/adapter/fused_function_object.hpp>
#include <boost/utility/result_of.hpp>
#include <boost/config.hpp>
#include <boost/timer.hpp>
#include <algorithm>
#include <iostream>
#ifdef _MSC_VER
// inline aggressively
# pragma inline_recursion(on) // turn on inline recursion
# pragma inline_depth(255) // max inline depth
#endif
int const REPEAT_COUNT = 3;
double const duration = 0.125;
namespace
{
struct fused_sum
{
template <typename Seq>
int operator()(Seq const & seq) const
{
int state = 0;
return boost::fusion::fold(seq, state, sum_op());
}
typedef int result_type;
private:
struct sum_op
{
template <typename T>
int operator()(T const & elem, int value) const
{
return value + sizeof(T) * elem;
}
template <typename T>
int operator()(T & elem, int value) const
{
elem += sizeof(T);
return value;
}
typedef int result_type;
};
};
struct unfused_sum
{
inline int operator()() const
{
return 0;
}
template<typename T0>
inline int operator()(T0 const & a0) const
{
return a0;
}
template<typename T0, typename T1>
inline int operator()(T0 const & a0, T1 const & a1) const
{
return a0 + a1;
}
template<typename T0, typename T1, typename T2>
inline int operator()(T0 const & a0, T1 const & a1, T2 a2) const
{
return a0 + a1 + a2;
}
template<typename T0, typename T1, typename T2, typename T3>
inline int operator()(T0 const & a0, T1 const & a1, T2 const & a2, T3 const & a3) const
{
return a0 + a1 + a2 + a3;
}
typedef int result_type;
};
template<typename F>
double call_unfused(F const & func, int & j)
{
boost::timer tim;
int i = 0;
long long iter = 65536;
long long counter, repeats;
double result = (std::numeric_limits<double>::max)();
double runtime = 0;
double run;
do
{
tim.restart();
for(counter = 0; counter < iter; ++counter)
{
i += func();
i += func(0);
i += func(0,1);
i += func(0,1,2);
i += func(0,1,2,3);
}
runtime = tim.elapsed();
iter *= 2;
} while(runtime < duration);
iter /= 2;
for(repeats = 0; repeats < REPEAT_COUNT; ++repeats)
{
tim.restart();
for(counter = 0; counter < iter; ++counter)
{
i = func(); j += i;
i = func(0); j += i;
i = func(0,1); j += i;
i = func(0,1,2); j += i;
i = func(0,1,2,3); j += i;
}
run = tim.elapsed();
result = (std::min)(run, result);
}
return result / iter;
}
template<typename F>
double call_fused_ra(F const & func, int & j)
{
boost::timer tim;
int i = 0;
long long iter = 65536;
long long counter, repeats;
double result = (std::numeric_limits<double>::max)();
double runtime = 0;
double run;
do
{
boost::fusion::vector<> v0;
boost::fusion::vector<int> v1(0);
boost::fusion::vector<int,int> v2(0,1);
boost::fusion::vector<int,int,int> v3(0,1,2);
boost::fusion::vector<int,int,int,int> v4(0,1,2,3);
tim.restart();
for(counter = 0; counter < iter; ++counter)
{
i += func(v0);
i += func(v1);
i += func(v2);
i += func(v3);
i += func(v4);
}
runtime = tim.elapsed();
iter *= 2;
} while(runtime < duration);
iter /= 2;
for(repeats = 0; repeats < REPEAT_COUNT; ++repeats)
{
boost::fusion::vector<> v0;
boost::fusion::vector<int> v1(0);
boost::fusion::vector<int,int> v2(0,1);
boost::fusion::vector<int,int,int> v3(0,1,2);
boost::fusion::vector<int,int,int,int> v4(0,1,2,3);
tim.restart();
for(counter = 0; counter < iter; ++counter)
{
i = func(v0); j += i;
i = func(v1); j += i;
i = func(v2); j += i;
i = func(v3); j += i;
i = func(v4); j += i;
}
run = tim.elapsed();
result = (std::min)(run, result);
}
return result / iter;
}
template<typename F>
double call_fused(F const & func, int & j)
{
boost::timer tim;
int i = 0;
long long iter = 65536;
long long counter, repeats;
double result = (std::numeric_limits<double>::max)();
double runtime = 0;
double run;
do
{
boost::fusion::list<> l0;
boost::fusion::list<int> l1(0);
boost::fusion::list<int,int> l2(0,1);
boost::fusion::list<int,int,int> l3(0,1,2);
boost::fusion::list<int,int,int,int> l4(0,1,2,3);
tim.restart();
for(counter = 0; counter < iter; ++counter)
{
i += func(l0);
i += func(l1);
i += func(l2);
i += func(l3);
i += func(l4);
}
runtime = tim.elapsed();
iter *= 2;
} while(runtime < duration);
iter /= 2;
for(repeats = 0; repeats < REPEAT_COUNT; ++repeats)
{
boost::fusion::list<> l0;
boost::fusion::list<int> l1(0);
boost::fusion::list<int,int> l2(0,1);
boost::fusion::list<int,int,int> l3(0,1,2);
boost::fusion::list<int,int,int,int> l4(0,1,2,3);
tim.restart();
for(counter = 0; counter < iter; ++counter)
{
i = func(l0); j += i;
i = func(l1); j += i;
i = func(l2); j += i;
i = func(l3); j += i;
i = func(l4); j += i;
}
run = tim.elapsed();
result = (std::min)(run, result);
}
return result / iter;
}
}
int main()
{
int total = 0;
int res;
typedef fused_sum F;
typedef unfused_sum U;
std::cout << "Compiler: " << BOOST_COMPILER << std::endl;
std::cout << std::endl << "Unfused adapters:" << std::endl;
{
F f;
std::cout << "F /* a fused function object */ " << call_fused_ra(f,res) << std::endl;
total += res;
}
{
F f;
std::cout << "without random access " << call_fused(f,res) << std::endl;
total += res;
}
{
boost::fusion::unfused_rvalue_args<F> f;
std::cout << "unfused_rvalue_args<F> " << call_unfused(f,res) << std::endl;
total += res;
}
{
boost::fusion::unfused_generic<F> f;
std::cout << "unfused_generic<F> " << call_unfused(f,res) << std::endl;
total += res;
}
std::cout << std::endl << "Fused adapters:" << std::endl;
{
unfused_sum f;
std::cout << "U /* an unfused function object */ " << call_unfused(f,res) << std::endl;
total += res;
}
{
boost::fusion::fused_function_object<U> f;
std::cout << "fused_function_object<U> " << call_fused_ra(f,res) << std::endl;
total += res;
}
{
boost::fusion::fused_function_object<U> f;
std::cout << "without random access " << call_fused(f,res) << std::endl;
total += res;
}
{
boost::fusion::unfused_rvalue_args< boost::fusion::fused_function_object<U> > f;
std::cout << "unfused_rvalue_args<fused_function_object<U> > " << call_unfused(f,res) << std::endl;
total += res;
}
{
boost::fusion::unfused_generic< boost::fusion::fused_function_object<U> > f;
std::cout << "unfused_generic<fused_function_object<U> > " << call_unfused(f,res) << std::endl;
total += res;
}
return total;
}
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