The latest release of Eclipse (Eclipse 3.2) comes with Callisto, a rich set of optional plugins for Eclipse 3.2. Callisto includes a powerful profiling tool called the Eclipse Test & Performance Tools Platform, or TPTP. TPTP provides a comprehensive suite of open source performance-testing and profiling tools, including integrated application monitoring, testing, tracing and profiling functionalities, and static-code analysis tools. Profiling tools are invaluable aids for localizing and identifying performance issues in all sorts of Java applications. In this new article on onjava.com, John Ferguson Smart looks at how you can use TPTP to guarantee high-quality and high-performance code, even during unit and integration testing.