When creating enterprise software that will need to handle thousands of transactions in near real time, performance of code becomes very important. There are many third party tools that can help analyze code performance, but I liked to focus on one that is built into Workbrain today called the Timing Monitor.
Spring in Workbrain - Part 6 - Using Spring in Legacy modules
As I'm discussed before, not all of Workbrain is making use of Spring. The core product has made it really easy to make use of your custom or core services outside of Spring through the use of the BeanLocator singleton class.