Как можно оптимизировать анимацию (parallax on mouseMove)?

var lFollowX = 0,
lFollowY = 0,
x = 0,
y = 0,
friction = 1 / 30;

function moveBackground() {
x += (lFollowX - x) * friction;
y += (lFollowY - y) * friction;

translate = 'translate(' + x.toFixed(0) + 'px, ' + y.toFixed(0) + 'px) scale(1.1)';

console.log(translate)

$('.bg').css({
'-webit-transform': translate,
'-moz-transform': translate,
'transform': translate
});

window.requestAnimationFrame(moveBackground);
}

$('.wrap').on('mousemove click', function(e) {

var lMouseX = Math.max(-100, Math.min(100, $(window).width() / 2 - e.clientX)).toFixed(0);
var lMouseY = Math.max(-100, Math.min(100, $(window).height() / 2 - e.clientY)).toFixed(0);
lFollowX = (20 * lMouseX) / 100; // 100 : 12 = lMouxeX : lFollow
lFollowY = (10 * lMouseY) / 100;

});

moveBackground();