Java By Example optimization techniques

Java By Example has interesting articles on Java code optimization:

• part #1 compiler optimizations


• part #2 general optimization techniques


• par t #3 variables and arrays


• part #4 methods

Optimize your web apps

While browsing the web, I found nice plugin for firefox called YSlow. It shows you slow aspects of displaying your page. Is it javascript,css,long HTML options ... it's all covered. On the page you can find links to podcast and screencast covering YSlow functionality.