I have an ASP.NET application that does a large database read. It loads up a gridview inside an update panel. In VS2008, just running on my local machine, it runs fantastically. In production (identical code, just published and put on one of our network servers), it runs slow as dirt.

Debug is set to false, so this is not the cause of the slow down. I'm not an experienced web developer, so besides that, feel free to suggest the obvious.

I have been using Firebug to determine what's going on, and here is what that has turned up:

On production, there are around 500 requests. The timeline bar is very short. The size column varies from run to run, but is always the same for the duration of the run.

Locally, there are about 30 requests. The timeline bar takes up the entire space.

Can anyone shed some light on why this is happening and what I can do to fix it? Also, I can't find much of anything on the web about this, so any references are helpful too.