Fastest way to write large STL vector to file using STL

Question

I have a large vector (10^9 elements) of chars, and I was wondering what is the fastest way to write such vector to a file. So far I\'ve been using next code:

ve         


        

Answer 1

If you have other structure this method is still valid.

For example:

typedef std::pair STL_Edge;
vector v;

void write_file(const char * path){
   ofstream outfile(path, ios::out | ios::binary);
   outfile.write((const char *)&v.front(), v.size()*sizeof(STL_Edge));
}

void read_file(const char * path,int reserveSpaceForEntries){
   ifstream infile(path, ios::in | ios::binary);
   v.resize(reserveSpaceForEntries);
   infile.read((char *)&v.front(), v.size()*sizeof(STL_Edge));
}