This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
You're showing a thousand records on a single page?!
In any case, it's tough to help without seeing the loop. Anything that loads a thousand records is going to generate a fair-sized chunk of HTML; depending on the HTML contents it could be browser-related. Have you tried with different browsers?