hi all i have 3050 x 3050 double matrix which is created through some calculations. This is a c application we got as a pilot project and we need to show them run faster. we have to first read this matrix from file which is CSV file and after some calculation write this back to file. Its taking more time in reading and writing the matrix. can any one give me a good algorithm for reading and writing this 3050 x 3050 double matrix. This is really a bottle neck for us, can any one help us.