Declaring variable in loop or before loop in AS3?

Should I declare the _mcContainer var befo开发者_如何学JAVAre the loop or no? (performance increase?)

for(var i:uint = _startIndex; i <= _endIndex; ++i){    
    var _mcContainer:MovieClip = _mcParent["i_" + _position];
}

or

var _mcContainer:MovieClip;
for(var i:uint = _startIndex; i <= _endIndex; ++i){
    _mcContainer = _mcParent["i_" + _position];
}

?

It's not hard to test...

...however according to the docs, it shouldn't make any difference because variable declarations are hoisted to the top of the method block anyway.

From the docs:

An interesting implication of the lack of block-level scope is that you can read or write to a variable before it is declared, as long as it is declared before the function ends. This is because of a technique called hoisting , which means that the compiler moves all variable declarations to the top of the function.