does boost library provide functions to pack the class/struct data into a byte array to shorten the length of serialized data? Currently i'm using stringstream to get the serialized data, for example -

struct data
{
   std::string s1;
   std::string s2;
   int i;
};


template <typename Archive> 
void serialize(Archive &ar, data &d, const unsigned int version) 
{
    ar & d.s1; 
    ar & d.s2;
    ar & d.i;
}

int main()
{
    data d;
    d.s1 = "This is my first string";
    d.s2 = "This is my second string";
    d.i = 10000;

    std::stringstream archive_stream;
    boost::archive::text_oarchive archive(archive_stream);
    archive.operator <<(d);
}

How would i use a byte array instead of stringstream for data?