msgpack/example/speed_test_nested_array.cc

// g++ -std=c++11 -O3 -g -Ipath_to_msgpack_src -Ipath_to_boost speed_test.cc -Lpath_to_boost_lib -lboost_timer -lboost_system
// export LD_LIBRARY_PATH=path_to_boost_lib

#include <msgpack.hpp>
#include <string>
#include <iostream>
#include <sstream>
#include <vector>
#include <boost/timer/timer.hpp>

template <typename T, std::size_t level>
struct vecvec {
    typedef std::vector<typename vecvec<T, level - 1>::type> type;
    static void fill(type& v, std::size_t num_of_elems, T const& val) {
        for (int elem = 0; elem < num_of_elems; ++elem) {
            typename vecvec<T, level - 1>::type child;
            vecvec<T, level - 1>::fill(child, num_of_elems, val);
            v.push_back(child);
        }
    }
};

template <typename T>
struct vecvec<T, 0> {
    typedef std::vector<T> type;
    static void fill(type& v, std::size_t num_of_elems, T const& val) {
        for (int elem = 0; elem < num_of_elems; ++elem) {
            v.push_back(val);
        }
    }
};

void test_array_of_array() {
    std::cout << "[TEST][array_of_array]" << std::endl;
    // setup
    int const depth = 16;
    std::cout << "Setting up array data..." << std::endl;
    typename vecvec<int, depth>::type v1;
    vecvec<int, depth>::fill(v1, 3, 42);

    std::cout << "Start packing..." << std::endl;
    std::stringstream buffer;
    {
        boost::timer::cpu_timer timer;
        msgpack::pack(buffer, v1);
        std::string result = timer.format();
        std::cout << result << std::endl;
    }
    std::cout << "Pack finished..." << std::endl;

    buffer.seekg(0);
    std::string str(buffer.str());

    // deserialized object is valid during the msgpack::zone instance alive.
    msgpack::zone mempool;
    msgpack::object deserialized;
    std::cout << "Start unpacking..." << std::endl;
    {
        boost::timer::cpu_timer timer;
        msgpack::unpack(str.data(), str.size(), NULL, &mempool, &deserialized);
        std::string result = timer.format();
        std::cout << result << std::endl;
    }
    std::cout << "Unpack finished..." << std::endl;

    msgpack::unpacked unpacked;
    std::cout << "Start unpacking...by void unpack(unpacked* result, const char* data, size_t len, size_t* offset = NULL)" << std::endl;
    {
        boost::timer::cpu_timer timer;
        msgpack::unpack(&unpacked, str.data(), str.size());
        std::string result = timer.format();
        std::cout << result << std::endl;
    }
    std::cout << "Unpack finished..." << std::endl;
    typename vecvec<int, depth>::type v2;
    std::cout << "Start converting..." << std::endl;
    {
        boost::timer::cpu_timer timer;
        deserialized.convert(&v2);
        std::string result = timer.format();
        std::cout << result << std::endl;
    }
    std::cout << "Convert finished..." << std::endl;
}

int main(void)
{
    test_array_of_array();
}