use css3 animation|transition, instead of jQuery native time slice animation.

css3animation.js

//= require modernizr
 
// Helper for performing css3 or jquery animations
;(function( window, $, undefined ){
    'use strict';
    
    $.fn.css3animate = function (rules, duration, easing, callback) {
        var $this = $(this);
 
        if (Modernizr.csstransitions) {
            $this.css(rules);
            if (callback) {
              setTimeout(callback, duration);
            }
        } else {
            $this.animate(rules,duration,easing,callback);
        }
 
        return $this;
    }
})( window, jQuery );