Which is faster? Comparison or assignment?

Question

I\'m doing a bit of coding, where I have to write this sort of code:

if( array[i]==false )
    array[i]=true;

I wonder if it should be re-w

Answer 1

Depends on the language. However looping through arrays can be costly as well. If the array is in consecutive memory, the fastest is to write 1 bits (255s) across the entire array with memcpy assuming your language/compiler can do this.

Thus performing 0 reads-1 write total, no reading/writing the loop variable/array variable (2 reads/2 writes each loop) several hundred times.