does controlling tellurian emanate any overhead?

is problem tellurian keyword variables don't finish adult using? compare:

function foo() {
    tellurian $fu;
    tellurian $bah;
    (something()) {
        $fu->dosomething();
    } else {
        $bah->dosomething();
    }
}

function bar() {
    (something()) {
        tellurian $fu;
        $fu->dosomething();
    } else {
        tellurian $bah;
        $bah->dosomething();
    }
}

i'm definitely wakeful controlling second slight creates surpassing formula many harder, it's generally comparison put your globals during start functions, so: ignoring inadequacy maintainability code-styling twin functions, there inadequacy between twin terms overhead?