Rad Grid Performance - Rendering too slow

[Ankit]

We're using RadGrid(with paging enabled) in a SharePoint site.
Our problem is that Grid takes too much time to load in the browser(7-8 seconds). I verified, that data fetching part is able to provide data to Grid within 1-2 seconds.

Here, We are not using the default template columns provided in RadGrid. 
We've created custom item templates(implementing the ITemplate interface) to create columns. e.g. to create a hyperlink column, We're using below template:

public class HyperlinkItemTemplate<TProperty, T> : ITemplate
    {
        public string PropertyName { get; set; }
        public string PropertyKey { get; set; }
        public string NavigateUrl { get; set; }

        public HyperlinkItemTemplate(string propertyName, string propertyKey, string navigateUrl)
        {
            PropertyName = propertyName;
            PropertyKey = propertyKey;
            NavigateUrl = navigateUrl;
        }

        public void InstantiateIn(Control c)
        {
            HyperLink hyperLink = new HyperLink();
            hyperLink.DataBinding += OnDisplayDataBinding;
            c.Controls.Add(hyperLink);
        }

        private void OnDisplayDataBinding(object sender, EventArgs e)
        {
            HyperLink hyperLink = (HyperLink) sender;
            hyperLink.Text = TemplateHelper.GetValue<String, T>((GridDataItem) hyperLink.NamingContainer, PropertyName);
            hyperLink.NavigateUrl = String.Format(NavigateUrl, TemplateHelper.GetValue<TProperty, T>((GridDataItem)hyperLink.NamingContainer, PropertyKey));
        }
    }

When we tried a RadGrid(with AutoGenerateColumns property set to true) with same amount of data set, it was much faster(almost 50% fast).
Is there any performance issue with RadGrid when using custom item templates?
Any suggestions, to improve the performance.

Thanks in advance.

[Pavlina]

Hello,

I recommend that you examine the article below for useful tips about how to optimize RadGrid performance: 
http://www.telerik.com/help/aspnet-ajax/grid-viewstate-reduction-techniques.html

Greetings,
Pavlina
the Telerik team