Animate Spring Effect

I am trying to produce a spring/bouncing effect and the TI animations aren't playing nicely with me. Normally, you could create a function based upon time, but since TI doesn't have that, I am trying to chain animations together.

My problem is that the animations are really choppy and not smooth. I get the dreaded "[DEBUG] ignoring new layout while animating in layout Child.." error a lot. So I figure not all the animations in the chain are fired because TI is not finished doing all it's animation stuff. I tried adding the animation.addEventListener('complete'), but my callback function was being called before the animation was finished. So I switched to the view.animate({}, callback) notion and it helped a little.

Right now I am trying to animate 36 views (each of them is a letter in a word game) at the same time, so it could be a performance issue.

If anyone has tips on animation performance or how to animate a view using a time based function, I would greatly appreciate the help.

var animIteration = 0;
 
var finalX = /* determine final x position */;
var finalY = /* determine final y position */;
 
view.animate({
    center : {
        x : finalX,
        y : finalY,
        curve : Ti.UI.iOS.ANIMATION_CURVE_EASE_OUT
    },
    duration : 300
}, function() {
    bounce();
    return;
});
 
 
var bounce = function() {
 
    var finalX = /* determine final x position */;
    var finalY = /* determine final y position */;
    var amplitude = view.height() / 2 / animIteration; // hack to produce a damping effect
 
    // some checks so this doesn't look forever
    if(amplitude < 2 || animIteration >= 20) {
        animIteration = 1;
        view.center = {
            x : finalX,
            y : finalY
        };
 
    } else {
 
        var diff = -1 * Math.cos(animIteration * Math.PI) * (amplitude / animIteration);
 
        setTimeout(function() {
            view.animate({
                center : {
                    x : finalX,
                    y : finalY + diff,
                    curve : Ti.UI.iOS.ANIMATION_CURVE_EASE_OUT
                },
                duration : 300
            }, function() {
                bounce();
            });
            letterView.animIteration++;
        }, 50);
    }
 
    return;
 
}