Declare an object inside or outside a loop?

Question

Is there any performance penalty for the following code snippet?

for (int i=0; i         


        

Answer 1

Don't prematurely optimize. Better than either of these is:

for(Object o : someList) {
    o.doSomething();
}

because it eliminates boilerplate and clarifies intent.

Unless you are working on embedded systems, in which case all bets are off. Otherwise, don't try to outsmart the JVM.