This document provides performance optimization tips for the different layers of an Oracle Application Development Framework (ADF) application: 1) For the model layer, tips include using bind variables in view object queries, avoiding complex logic in backing beans, and defining unique keys on view objects. 2) For the user interface layer, tips include setting appropriate fetch sizes for trees and tables, minimizing the number of application module data controls, and using AJAX when possible. 3) For the controller layer, tips include reusing task flows, defining navigation in task flows rather than backing beans, and keeping managed beans in the lowest possible scope.