function updateManySetup() {
    var numAdditions = 1e4;
    
    for (var i = 0; i < numAdditions; ++i) {
        var currentTween = new TWEEN.Tween({a: 0.0});
        currentTween.to({a: 1.0}, 1.0);
        currentTween.start(0.0);
    }
}

function updateMany() {
    TWEEN.update(0.5);
}