Performance problems in A4 release with dynamic listview

Performance problems in A4 release with dynamic listview

I have encountered some major performance differences between a3 and a4.

I have a dynamic listview using <li> elements, in a3 version the following takes 142ms

var spList = $("#CustomerList").find( "#listview2" );
spList.listview('refresh');

in a4 version it takes 13204ms.



Is there something different that needs to be done in my code or is this a bug?