Can I get best performance making static variables?

Question

Why some people do:

char baa(int x) {
    static char foo[] = \" .. \";
    return foo[x ..];
}

instead of:

char baa(int x) {
          


        

Answer 1

Yes it makes difference , if u have declared a variable as static :

1. Firstly, the memory will be allocated in either bss or data segment instead of stack.

2. Secondly, it will be initialized for once only , not every time unlike other variables of function, which will surely create difference.

3. Thirdly, it retains it's value b/w function calls.So depending on the situations you should use it.