Function random_binary_string

sandbox/performance.cpp:276–282

template <size_t N>
std::string random_binary_string(std::mt19937 & gen)
{
  std::string s(N, ' ');
  for(auto & c : s )
    c = std::uniform_int_distribution<char>('0', '1')(gen);
  return s;
}

struct PoDStructCereal
{