JavaScript function's memory size

This seems rather obvious to me, but I just wanted to make sure. In terms of memory used when the foo function is stored, would it better to do this:

function foo(){
    var hey = {};
    hey.a = 1;
    hey.b = 1;
    alert('done');
}

or

function foo(){
    var hey = getHey();
    alert('done');
}
function getHe开发者_运维问答y(){
    var hey = {};
    hey.a = 1;
    hey.b = 1;
    return hey;
}

Since getHey() is just going to be a reference to the actual function, I'm not sure whether it stores foo as is, or with an embedded getHey.

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logically the function will be stored in memory while the parent scope lives. and that reference does take a bit of memory but the real danger is usually the overhead when calling function in a loop, just having a single function call inside a large for-loop could add a lot of processing time.

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They're separate functions. What'd probably save some space however is:

function foo() {
  var hey = { a: 1, b: 1 };
}