Does a method call in in a for loop declaration affect performance?

Asked Jun 29 '16 at 16:20

Active Jun 29 '16 at 16:20

Viewed 26 times

For example is this

for (String s : getStrings()) {
    // do something
}

less efficient than this?

ArrayList<String> strings = getStrings();
for (String s : strings) {
    // do something
}

Would getStrings() get called every time, thus affecting performance?

asked Jun 29 '16 at 16:20

secondbreakfast

1

I think the compiler takes care of that, so both are as efficient. – dabadaba Jun 29 '16 at 16:24
1

It actually makes no difference. The enhanced for loop is compiled into the same code as with using an iterator, so the method will be called only once. See the linked question. – Tunaki Jun 29 '16 at 16:25
@Tunaki, thanks for the link – secondbreakfast Jun 29 '16 at 17:02

0 Answers0