I use update panels all the time when i wanna to update specific part of my page but recently i face performance problems ( i mean it \'s slow in rendering the
There is an alternative to UpdatePanels, but still using PageMethods. It is a combination between jQuery and jQuery templates. It is proven to be faster than the UpdatePanels. Further reading on the resource below, where you can find more articles dedicated to this topic.
http://encosia.com/use-jquery-and-aspnet-ajax-to-build-a-client-side-repeater/