AsyncPostBack Slow In UpdatePanel

I have a datalist which contains image buttons inside the updatepanel.

This page actually work this way, user click on the image buttons and the image of the button will chage accordding to some logic.

My problem is it work pefectly in my local host, but when deploy to the server and access thru internet, it take me more than 3 seconds to show the result i want to see.

Anyone can advice?

Does that mean if you do not use the UpdatePanel and AJAX, full postbacks are much faster?

No, I just like to find out the reason why it is slow comparing to those pages which contain only image buttons in the updatepanel.

Is it because of the datalist ?

hmm maybe you can install a tool like Fiddler and find out what's seeping into the network link. most likely it's transmitting lots of stuff (viewstate) to the server, hence the slowww perf.

eric_tcp:

No, I just like to find out the reason why it is slow comparing to those pages which contain only image buttons in the updatepanel.

I don't think you understood my question. If you remove the UpdatePanel and use plain old postback, does it suddenly become fast?