Hi,
I´m developing a web application that must be responsive on all devices. The design works perfectly on all devices, BUT when accessing the application through an iPhone the update panels is painfully slow. The same without, but that´s because the whole page have to reload if I get rid of them. 
When accessing the application through a computer in IE11, FireFox or Google Chrome there is great speed.
The code below gives an example of how my code looks like. And my question is, why is it fast on desktop and slow on mobile devices? The application is uploaded on an external server, so there´s no faster access through desktop. 

<div class="col-xs-6 col-sm-5 col-md-5 col-lg-5"> <div id="div4" runat="server" class="form-group"> <asp:UpdatePanel ID="updatePanel7" runat="server" UpdateMode="Always"> ...

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