This tag is associated with 2 posts

Why Is Printing “B” Dramatically Slower Than Printing “#”?

I generated two matrices of 1000 x 1000: First Matrix: O and #. Second Matrix: O and B. Using the following code, the first matrix took 8.52 seconds to complete: Random r = new Random(); for (int i = 0; i < 1000; i++) { for (int j = 0; j < 1000; j++) { … Continue reading »

C++: Why is one loop so much slower than two loops?

Suppose a1, b1, c1, and d1 point to heap memory and my numerical code has the following core loop. const int n=100000 for(int j=0;j<n;j++){ a1[j] += b1[j]; c1[j] += d1[j]; } This loop is executed 10,000 times via another outer for loop. To speed it up, I changed the code to: for(int j=0;j<n;j++){ a1[j] += … Continue reading »