Hi,
I could solve the performance issue. I defined explicitly views ( views: ['day', 'month','year']) and now it works about 10 times faster.
But I got now a further problem with ie9. Its not possible to open summary views properly. It causes an error in kendo.all.min.js, row 13 char 29343.
r.prototype=new t,r.prototype.nodeName="#text",r.prototype.render=function(e,t){
var n;
t.nodeName!==this.nodeName?(t.remove(),n=document.createTextNode(this.nodeValue),e.appendChild(n)):(n=t.node,this.nodeValue!==t.nodeValue&&(n.nodeValue=this.nodeValue)),this.node=n
}
n.nodeValue is an invalid argument. In chrome and firefox everything works fine!
Just ask for further information. Unfortunately a profiler file is not possible.