BlockUI bad performance

Question

I am having serious performance issues with BlockUI and ASP.NET AJAX on my aspx page. I am trying simple element blocking but it is fading in with a a lag/delay. Does html errors on page would impact blockUI ? I might have some on my page. I am blocking a large div spanning well above the browser vertically. Also, the unblock works great for the same page (without any delay/lag). In case of a timeout on my Update Panel, the fadein works good too but just comes with a lag otherwise

function blockMaster()
{
    $(document).ready(function(){
        $('#ftMaster').block({message:"<h2>Just a moment...</h2>"});
        $('#<%=btnAJAX.ClientID%>').attr("disabled",true);
    });
}

Answer 1

I believe that HTML errors would prevent blockUI from working at all, were they serious. What happens when you comment out the block() call from $(document).ready() and call it manually via Firebug once the page has loaded completely? Is there still a delay? Do you have other handler functions that are being called on the ready event? Who calls blockMaster(), and when?