Does reuse variable make program faster or save some memories?

cpthk · #1 09-02-2010, 04:22 PM

If I have this code:

Code:

void test(){
    Map *m1 = new Map;
    ....
    Map *m2 = new Map;
    ....
}

I optimized to:

Code:

void test(){
    Map *m1 = new Map;
    ....
    m1 = new Map;
    ....
}

Does this optimization makes program run slightly faster or save some memories since it does not have to create another variable?

shabbir · #2 09-02-2010, 09:33 PM

You are only saving the size of the address storage because any way you are allocating the memory for the variable.