Which loop is faster?


for (I = 0; I < N; I++)
  for (J = 0; J < M; J++)
    update(Xs[I][J]);
or

for (I = 0; I < N; I++)
  for (J = 0; J < M; J++)
    update(Xs[J][I]);
???

>>48
Perhaps you should write some actual code instead of googling shit. Anyways, here is what I came up with...

public class Main {

    public static void main(String[] args) {
        int i = 0;

        for (i = 0; i < 5; i++) {

        }//end first for

        System.out.println("The value of i is " + i);

        i = 0;

        for (i = 0; i < 5; ++i) {

        }//end second for

        System.out.println("The value of i again is " + i);
    }

}

And the output is..

run:
The value of i is 5
The value of i again is 5
BUILD SUCCESSFUL (total time: 0 seconds)