Как я могу ускорить выполнение программы?

int main() 
{
    ifstream file_for_reading("C:\\Tests\\20");
    int a,b,c;
    int edge, number_of_vertexes;
    file_for_reading >> number_of_vertexes >> edge;
    if (number_of_vertexes < 1 || number_of_vertexes > 30000 || edge < 0 || edge>400000) { cout << "Correct your vallues"; exit(1); };
    short** matrix = new short* [edge];
    for (int i = 0; i < edge; i++)
        matrix[i] = new short[3];
    int tmp = 0;
    for (int i = 0; i < edge; i++) {
        file_for_reading >> matrix[i][tmp] >> matrix[i][tmp+1] >> matrix[i][tmp+2];
        tmp = 0;
    }
    file_for_reading.close();
    //Dijkstra(matrix, number_of_vertexes);
}

#include <iostream>
#include <fstream>
using namespace std;
struct Vert
{
    short c[3];
};
int main() 
{
    ifstream file_for_reading("d:\\temp\20.dat",ios::binary);
    if(file_for_reading)
    {
        int edge;
        file_for_reading.read((char*)&edge,sizeof(int));
        Vert* matrix = new Vert[edge];
        file_for_reading.read((char*)matrix,edge*sizeof(short));
        file_for_reading.close();
        //..........
        delete[] matrix;
    }
}